Malicious PDF — malware analysis report

Static analysis result for SHA-256 026207950e02df95…

MALICIOUS

PDF

75.5 KB Created: 2021-10-04 01:05:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d7640ab3b4ba253d270612108b2ee244 SHA-1: 74b33e4247c3258c622a4f88161cd6a6638cb833 SHA-256: 026207950e02df957e030d4a56728d170fe8923de7847218a006436061b52d13
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document contains numerous embedded URLs pointing to disposable domains, characteristic of a link farm designed to redirect users to malicious sites. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM specifically identifies this pattern, suggesting the document's primary purpose is to facilitate phishing or malware distribution through these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://cructi.ru/uplcv?utm_term=the+sons+and+daughters+of+god PDF link annotation
    • http://archinfo.ru/uploads/file/feliximovomebonikevil.pdfIn PDF document text
    • http://drsrkbedcollege.com/ckeditor/ckfinder/userfiles/files/vimegebapewifo.pdfIn PDF document text
    • http://medob.org/SITE/files/editor/file/50779763356.pdfIn PDF document text
    • http://cdkuys.handysociality.com/upload/files/jiwaxodobowivetulupape.pdfIn PDF document text
    • https://turasmobilya.com/img/editor/image/file/16317520680.pdfIn PDF document text
    • http://josepholszowka.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/87635098926.pdfIn PDF document text
    • https://emmaushuis.org/pages/jevubumexux.pdfIn PDF document text
    • http://globalcentral.net/contentupload/fckeditorUploads/organization_/file/tisolexunowibixevo.pdfIn PDF document text
    • http://kondicionery-domodedovo.ru/upload_picture/file/zeguroxazi.pdfIn PDF document text
    • http://gpmpoolandspa.com/ckfinder/userfiles/files/83846237174.pdfIn PDF document text
    • http://biancoacolori.it/userfiles/files/mekadipezupewa.pdfIn PDF document text
    • https://elminhaj.org/userfiles/file/divutorom.pdfIn PDF document text
    • https://domilot.com/uploader/files/dagajape.pdfIn PDF document text
    • https://shop-ecobati.com/medias/upload/files/48798889973.pdfIn PDF document text
    • https://warsztatgdynia.pl/app/webroot/media/files/xelabifebijuku.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/64a9b9a7ce0165fc335c1191609dcc17/19832827876.pdfIn PDF document text
    • http://abwjefferson.com/uploads/files/tapimafimulutesumopolanuj.pdfIn PDF document text
    • https://futuresbuilder.net/dayafter/uploadimages/newsimages/file/25053765025.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/39m09q2tose7l3i2q2bh43clcc/fugologukebep.pdfIn PDF document text
    • http://theclubburger.com/uploads/files/32132248679.pdfIn PDF document text
    • http://nacyc.jp/Upload/file/76589793798.pdfIn PDF document text
    • http://gernano.eu/gfx/userfiles/files/fadewoxivamazakide.pdfIn PDF document text
    • https://tenfci.net/userfiles/file/ruwilefijaman.pdfIn PDF document text
    • https://bc2000.order-pro.com/ckfinder/userfiles/files/xuzureziratid.pdfIn PDF document text
    • http://kamakuralosgatos.com/uploads/files/nefanerak.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_off0000c0a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0A1 18488 bytes
SHA-256: 2994611bd82bde5dca85c066baf6b9e5b28461b4656f4516efb7b11fd00a1ef4
font_01_sfnt_off0000f089.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF089 10556 bytes
SHA-256: 7b5667335d739cfb1fc3023bcbc0700e4f9f723cbeae5bd021ff808292c7681e
font_02_sfnt_off0001085b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1085B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1