Malicious PDF — malware analysis report

Static analysis result for SHA-256 a50e4f8f811f4385…

MALICIOUS

PDF

90.5 KB Created: 2021-09-11 07:48:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 20eed27ced331b0c1365b8a362574477 SHA-1: fef2b7b74576bcca25abe68c7e8b58112850a544 SHA-256: a50e4f8f811f438501fb5a48b226d6b370659b735348464abfef2ba9f4224d4b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous external URIs pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and embedded URLs are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://allytemp.ru/uplcv?utm_term=unturned+radiation+suit+id PDF link annotation
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1612f7c769e48b---zumotukuguroperisu.pdfIn PDF document text
    • http://eng.sut.ac.th/tce/2016/administrator/ckfinder/userfiles/files/xezubadurabonabo.pdfIn PDF document text
    • http://2girlstrippin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f220abdb40---donujugemo.pdfIn PDF document text
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613c17f067d6c---57796767002.pdfIn PDF document text
    • https://immo-cjeanpaul.lu/userfiles/files/15633036592.pdfIn PDF document text
    • https://yukkumpulgroup2.com/contents/files/pivapanexuri.pdfIn PDF document text
    • https://vanvoorst.info/uploaded/file/86472439387.pdfIn PDF document text
    • https://stephankeppel.com/userfiles/file/50310868871.pdfIn PDF document text
    • http://vigen12.com/userfiles/file/93714940957.pdfIn PDF document text
    • http://nurugelexport.com/ckfinder/userfiles/files/51944670536.pdfIn PDF document text
    • https://virker-ikke.dk/files/40615440906.pdfIn PDF document text
    • http://sonhanint.com/uploadpic/sun/files/202109061002297465.pdfIn PDF document text
    • https://alshaabcoop.com/userfiles/file/genidipov.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/e85930738ca6a606a7a99818c1bf3913/58537298231.pdfIn PDF document text
    • https://0955205219.jwa.tw/userfiles/files/tufuxiv.pdfIn PDF document text
    • https://francemonde.news/UserFiles/file/95142617234.pdfIn PDF document text
    • http://clerus.hu/files/file/43822132453.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/kmthl4t09n3n36m3sun2b32mqf/buzajovojibunulamil.pdfIn PDF document text
    • https://areicon.com/images/file/jozaxaxizeke.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/ccrl2fqvs4m8qhvv5e21rv9p42/28664448908.pdfIn PDF document text
    • https://aiaciran.org/cache/fck_files/file/fazifixu.pdfIn PDF document text
    • http://letsbelegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/44176910333.pdfIn PDF document text
    • http://malir-naterac.info/UserFiles/File/rugadosiwese.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA12 19384 bytes
SHA-256: 6addbbe15eca30527933ee72039eaf9935f1c2b5a1e8be7df8a58b445be39167
font_01_sfnt_off00012b72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B72 10300 bytes
SHA-256: 5b3d899f9265ea5c2ec6e77bb484ddeb40c7290ec664a3128e23b3e4434e1b9b
font_02_sfnt_off000142cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.