Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9a6a70222318d19…

MALICIOUS

PDF

88.8 KB Created: 2021-06-26 14:24:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 25718b5b7f435c5319c4a673a80765a5 SHA-1: cf7e6114dab9051a7fde3137d11806588d579949 SHA-256: d9a6a70222318d19a47921739afe789605b2bb3d779a3b1abab9da6838655cc1
156 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous links pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the high detection scores indicate a phishing or malware distribution attempt.

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://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/16087ffad7b292---98785698125.pdf
    • https://taxiparga.com/wp-content/plugins/super-forms/uploads/php/files/441c3940b2390f1e9b87a7d07e92da9a/zofojotuludevi.pdf
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/82b421082bbf2911d448c9c1929220c1/vibexukaroloxoxudo.pdf
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160a182bf3c3b5---wutunixitemixu.pdf
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/vagojojejatixuvuvudagi.pdf
    • http://mg001.cn/upload_fck/file/2021-5-6/20210506165814931786.pdf
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/0dc3f0623a48ec676c3f9adc15b817e7/2715724329.pdf
    • http://capitalclassof1971.com/clients/4/4c/4c1e4f015ba9b8bec237dc1ca705466d/File/nisanumojovis.pdf
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/c74c6eb7d65c72893c5ba5054e3f3285/24597093153.pdf
    • http://www.bluewhaleline.com/image/upload/File/57984297511.pdf
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/12pclo8guhlvpm8lnt0uq3tgh2/fuzeposedivaf.pdf
    • https://jordan.si/dokumenti/file/50043259661.pdf
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/d59e8739f6d1711b7ca38eaf3ecda213/64134555786.pdf
    • https://presentkompaniet.com/img/content/file/32282060794.pdf
    • http://shinex-auto.com/userfiles/file/jivixirulirawuze.pdf
    • http://hoteldanang.vn/uploads/images/files/80318835539.pdf
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b7019524c0b---daritejelezatexakox.pdf
    • http://xaydungphongphu.com/uploads/files/98063247122.pdf
    • http://poorclarescork.ie/images/38521595988.pdf
    • http://vilaportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b85ab6a844d---xusatavurifizezavoresis.pdf
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/a44a83f859650e631cefe0da37d5a078/39525396660.pdf
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b963eb0a299---63907831548.pdf
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a7c14e1cda3---sobilevokugapusog.pdf
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/f19anh0k9ukf0ujo8nkaj54ih7/67378935150.pdf
    • http://mosjob.ru/images/file/85974027984.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=desperately+in+love+meaning
    • 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_off0000f555.bin
0cc4c74abeb7b01ae29500153d7d371ee4b62c98bcdfd31f90abde9116a1b2de
pdf-font-stream PDF embedded font (sfnt) at offset 0xF555 10776 bytes
font_01_sfnt_off00010e33.bin
1aaa5a0534d0af01cd5faa631b0f0513c76363222c4d85c4a3cfaef372d98045
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E33 18396 bytes
font_02_sfnt_off00013de1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13DE1 16792 bytes