Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ba3c672db967c03…

MALICIOUS

PDF

118.3 KB Created: 2021-06-25 17:52:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 3a4baa38b6048fe9232b8d6434fa2a9d SHA-1: 381682aff0eb22dbfe882d3ad8857520a68b781b SHA-256: 2ba3c672db967c03b6475f953741bd51454bdf513823f31ce411fa28ac4e2eaf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's designed to exploit vulnerabilities or lure users into downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9234

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://oniceh.ru/uplcv?utm_term=it%27s+been+a+long+day+lyrics+charlie+puth PDF link annotation
    • http://elturo.ru/img/upload/files/93233648076.pdfIn PDF document text
    • https://lederstuehle-shop.de/ckfinder/userfiles/files/lujadafunijisutomi.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160b4258e29feb---73880359505.pdfIn PDF document text
    • http://vitaminyplus.eu/files/file/97696003132.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607484f3ac3d1---joxuwevigimaxegivufa.pdfIn PDF document text
    • http://interstyle.org/content/xuploadimages/file/juriru.pdfIn PDF document text
    • https://www.northernillumination.com/wp-content/plugins/super-forms/uploads/php/files/0403e9519132385626637e7a29ad6aa5/29502701775.pdfIn PDF document text
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/98b11909b1a234353d2057a84fc029c3/36443652879.pdfIn PDF document text
    • http://elmiraclassiccountry.com/wp-content/plugins/super-forms/uploads/php/files/c6a2a5e29kf5na2bvv1dfun1i0/74005588402.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/077202105a327623cb86e5a3521710e1/dexokovipevigagugep.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/76pv2tede0bjls10npn5furtq5/53880483474.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/3e23fe27ddea7e52bf9803c30555a8c6/boregexugabizoniwu.pdfIn PDF document text
    • http://obasekiestates.com/UserFiles/file/kirawenibi.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/ldrjtgheum3nou3q0b8m8v0jmd/nepof.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/ab01226ee62c22bf92e852ae0291af92/4080521328.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1650aa2483---doriremanudojakewigevifu.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cdd0bdf0418---69766126480.pdfIn PDF document text
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160876ff640f80---3338047447.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c1cbf138ce---jegutobevewuxotagelo.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160b9b39b117a2---gimitonagiretomedax.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608bb171d1dfc---keserirusenasobolelamel.pdfIn PDF document text
    • https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/f9s2doneeldb9u6irco4jdi3l6/61016547950.pdfIn PDF document text
    • http://niestachow.pl/data/aktualnosci_imgs/file/63342409686.pdfIn PDF document text
    • http://belst.by/upload/file/64173625472.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080727f86b50---89734926000.pdfIn PDF document text
    • http://allycatering.com/userfiles/15985525969.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013bbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BBC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000153d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153D3 11132 bytes
SHA-256: 7aa2baa04ef3b3702ed56d3957cd5063f73334072561d46086bf3d1f564cd54d
font_02_sfnt_off00016d64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16D64 21268 bytes
SHA-256: 9ea35cc16f78520865db745bed3ff05377e8728f64afe412cd4b036c433ef8e0
font_03_sfnt_off0001a1cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A1CC 18776 bytes
SHA-256: 3ded9aaca2ef9e6c6e95cee9882111b9cda0db582afcb602817e0619031ab472
font_04_sfnt_off0001bfad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BFAD 1856 bytes
SHA-256: 184a936bd1ce5dff700adc4e6a12c67a52a21ba3f6bd4f31defed58e18ed8b92

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