Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fde6a7bb235da86…

MALICIOUS

PDF

90.8 KB Created: 2021-07-30 00:59:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 62eef7bff07c8e1f7be3fc4f391c3763 SHA-1: 563aad1529b98d78e997dda93baea899b5ab82c4 SHA-256: 4fde6a7bb235da86e2d660fb259a2db53c360a1a12ce151b11b4ec5dfe600705
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to lure users to potentially malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://greaterdeliveranceministries1.com/clients/61527/File/48562655461.pdf In PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b0d5ddae99---nomusurazezixuletekosa.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081f64f5f1ba---94063184085.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/004d8d36ee0dffa26f4a4a40d0922ac8/levexo.pdfIn PDF document text
    • http://1-cx.com/ckfinder/userfiles/files/63728930767.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076a94759164---jisinelirowubodib.pdfIn PDF document text
    • https://morabia.fi/images/file/xavuke.pdfIn PDF document text
    • http://verdantnorwich.com/clients/3/30/306756bb587dffcd11ca74610d845a16/File/27932774300.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/0c7e479aee3ba878cbf55c933a7048fa/24936736680.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160c6f0e26505a---vipanetosinukit.pdfIn PDF document text
    • http://phsclassof1970.com/clients/875774/File/19409213019.pdfIn PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/a88e00bee32349b9a5d962bca62474c5/puxamowulewov.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/fb3c9075ef60c9f1b60b2482e49ff81f/lugejoduwugemovabagoribid.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/0e49962ba825b5914751d5e8f6a588c6/lujazitakupugogaguvevizod.pdfIn PDF document text
    • https://tedvandergulik.nl/userimages/file/34593744790.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b0cf6ad30cc---jopopaselaminu.pdfIn PDF document text
    • https://beaszemin.com/files/90328600164.pdfIn PDF document text
    • http://boxethai38.com/upload/file/pomozuzurixuwowa.pdfIn PDF document text
    • https://angel-juicer.com/FileData/ckfinder/files/20210621_F811C3E05904374A.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/0d18709e7ffb27f644914454a0b194bb/pilefepozozelipudu.pdfIn PDF document text
    • http://fapannimario.it/userfiles/files/21442279689.pdfIn PDF document text
    • https://kalyna.ua/sites/default/files/userfiles/file/70173253228.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=autodesk+autocad+2017+license+keyPDF link annotation
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB1 10896 bytes
SHA-256: f228b52eb8281f3802669d6a564baab7a171ab620f6f97c0905f757a41b107e9
font_01_sfnt_off00010636.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10636 29940 bytes
SHA-256: 709e1f008cd7bc6a4a643f70f3ac344580c29ce7378e45d313283d76a8784d78
font_02_sfnt_off000142a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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