Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab0f9671fe67fb2c…

MALICIOUS

PDF

104.0 KB Created: 2021-06-30 15:50:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f00b7e1a6573cb5d73a08036e7be8bec SHA-1: 7367d2119f3efbe1babc8444e6a5c368f90ccac3 SHA-256: ab0f9671fe67fb2cdfcf8d1a7ccd0b065dc97608da71788a3e2fc1e24864c417
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious. It contains numerous links pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to redirect users. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature, likely serving as a lure for phishing or to distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://crysiq.ru/uplcv?utm_term=list+of+current+monarchs
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607e9e17c4f38---jonebavodidov.pdf
    • http://autoset66.ru/admin/ckfinder/userfiles/files/vawanifukexawifipiwetobo.pdf
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093b2cdb5d05---xanoporebolepanujanugigi.pdf
    • http://rotang.net/userfiles/file/23401306652.pdf
    • https://aawyx.com/sites/default/imageuser/file/daxulipebuvut.pdf
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a079fcc92f4---96995542495.pdf
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7835fba881---39171391640.pdf
    • https://alsterparkett.de/wp-content/plugins/super-forms/uploads/php/files/b01eu3e0bhqjbk3i7q76q47cos/36336854187.pdf
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160ab98d8047d8---disugoxokatademuv.pdf
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/f3b97da4d8cb96a36bb142010f7afa2b/19185950935.pdf
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/07a314b56bb989e40d29b3d44fbcdcea/subumeze.pdf
    • https://accuratesearch.com/userfiles/file/samupewabazodi.pdf
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/7mbjptpsjjucbn33lnd8apr2tl/6197059907.pdf
    • http://beijingxinzhi.com/userfiles/file/20210512103035_1227884468.pdf
    • https://superpart.com/files/zemotodapudaginuluzew.pdf
    • http://rotarylaspalmas.orgdocumentos/file/kolamokefek.pdf
    • https://ropaalmayoreo.com/images/userfiles/file/31958378759.pdf
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083c55ac4854---11380293892.pdf
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/fb8fbcb16602a6b8f203e4b5b5a53a91/mimavozetew.pdf
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aea1761c077---kolakituxoti.pdf
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607df7f488b76---sepakebav.pdf
    • http://kondicionery-vidnoe.ru/upload_picture/file/limaritu.pdf
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/ed3be95cd9f3b1c30a3e62304e0ed49e/vazimevakaf.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000134c5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x134C5 16792 bytes
font_01_sfnt_off00014cd7.bin
b294618243e385cd7c0cdb3fcdf63c7fbbcdb51ff4d69827b9ce046da1c4c000
pdf-font-stream PDF embedded font (sfnt) at offset 0x14CD7 17820 bytes
font_02_sfnt_off00017a7d.bin
ddfdce739ece1cd27fcec002804c8fff81922e3f0990e83225dc21870e3a2afb
pdf-font-stream PDF embedded font (sfnt) at offset 0x17A7D 10612 bytes