Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ea56ece07364479…

MALICIOUS

PDF

81.4 KB Created: 2021-09-01 05:21:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: afa8468f59d865b50def276bfdd4a7a9 SHA-1: 7fdf963905f81068c721b229582231488beaa4c2 SHA-256: 0ea56ece07364479081b9ac55fa21f6543373d8475a600c00ff37ef39cda55a0
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with many URLs pointing to potentially compromised or disposable domains. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure suggests an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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 http://fitviewer.info/files/file/dexivo.pdf In PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7e0ed6819---32821343455.pdfIn PDF document text
    • https://topupdana.com/contents//files/fogolid.pdfIn PDF document text
    • http://mynigaoe.com/upload/file/20210808072246.pdfIn PDF document text
    • https://epiphanych.com/images/file/sitoxosavagamisolojawu.pdfIn PDF document text
    • http://sobsai.com/ckfinder/userfiles/files/tevoradekepepevod.pdfIn PDF document text
    • https://immobilgold.com/file/savakiki.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/pg9ai6p9r7mri60qb76jdmolol/foviwopamanaliver.pdfIn PDF document text
    • http://manninareunion2012.com/clients/0/03/03b30fdf9aaeeba733afadbef254ff7b/File/30190711619.pdfIn PDF document text
    • http://udmvdpo.ru/images/files/16778045898.pdfIn PDF document text
    • https://carea2plus.com/wp-content/plugins/super-forms/uploads/php/files/fcedaf20bdde1fe7ecbf8ddb09a0ef24/wamawafozixifalevoneloja.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ae2ffbe24ec---lulivafonekoxe.pdfIn PDF document text
    • http://studiophotosfashion.it/userfiles/files/1272591800.pdfIn PDF document text
    • https://vivekanandbawwa.com/userfiles/file/52518967860.pdfIn PDF document text
    • http://kashima.cc/userfiles/file/98448794297.pdfIn PDF document text
    • http://shopcode.ru/uploads/file/zepaligaxuliz.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcee5142cb9---magenovaxafafunosajovuje.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/tanisejajil.pdfIn PDF document text
    • https://thefertilizerequipment.com/d/files/74646675510.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e2afd2de0c---muvuxiwupuzerirozejubuz.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd6e75fd2b---61471323816.pdfIn PDF document text
    • https://nicklason.se/ckfinder/userfiles/files/xavunafumamibilamejemo.pdfIn PDF document text
    • https://actaviaserica.org/board/file/files/mopemejeni.pdfIn PDF document text
    • http://terhautz.com/upload_files/files/20046357160.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=difference+between+transparent+and+translucentPDF 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_off0000dabd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDABD 10820 bytes
SHA-256: 14902fdd033ef3d6360403bc18dcbe5bad455fa2d1f4ca6ab588fb64b7fdd2b2
font_01_sfnt_off0000f3b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B4 16596 bytes
SHA-256: e5b86b5471c2f4d75463528261a84448e67819b94927a5d9ef406364f0a1b146
font_02_sfnt_off00011db1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DB1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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