Malicious PDF — malware analysis report

Static analysis result for SHA-256 293ac96110ae2997…

MALICIOUS

PDF

85.8 KB Created: 2021-07-03 21:04:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fb3ae87948f4c134de2b5316996177b6 SHA-1: 4dd9d8006bb995e3a73bc3db68347d7c9ea6fc91 SHA-256: 293ac96110ae299732fe16477274fdeadaf5daa9772d07e74d0d0ad3becefc33
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with many URLs pointing to compromised CMS upload storage and disposable hosting, suggesting a phishing or malware distribution scheme. The document body is heavily obfuscated and unreadable, providing no further context on the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ahlhy.com/uploads/file/182024194142.pdf
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/1254ea360fa3a759cb6211718df61843/rumugonuvunubodemidab.pdf
    • http://dlzj.net/upload/files/20210625234125907670.pdf
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b166cc7339d---26397821663.pdf
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/c6144c06aed87e76e28f95d40ea4157e/zixesibinedodoreravajup.pdf
    • https://amd-export.com/site/upload/file/tamelida.pdf
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16084364587366---molezimimi.pdf
    • http://activesolutionelectric.com/images/file/tapezosomajuroxunezutuf.pdf
    • http://poiskvod.ru/images/file/50435956963.pdf
    • http://mashtalkandil.com/userfiles/file/gejuwelut.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160819d64b648f---ritovar.pdf
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160bc68693be2f---fononitulanorizu.pdf
    • http://krajinar.cz/soubory/files/sedigojepujofewafaxiro.pdf
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/daaf9dc2f0fec6fe3e3fb1c38a9f724d/dupipubafunuw.pdf
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f10787ac20---972702347.pdf
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1606fe9f1bcdf6---pirixovokizaziwomex.pdf
    • http://doks-films.com/pcms/content/file/fevalageroligowutu.pdf
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/13adc65bcf2fd66faee59ff1bc253329/61750695272.pdf
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608cd16614309---80225495042.pdf
    • http://www.evisiontiendaonline.com/ckfinder/userfiles/files/lorurixejabilizaxez.pdf
    • http://palletgoanloi.com/img-dn/files/pujafivapiveraf.pdf
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/e0267pj29919sn55721eb1us17/wapoxelororo.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=ccc+question+paper+download
    • 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_off0000e981.bin
8c6f474d3e75fca25cc9540f9babb53d3780c13eea90a9d6d363bd7b718cec8e
pdf-font-stream PDF embedded font (sfnt) at offset 0xE981 10872 bytes
font_01_sfnt_off0001029d.bin
411470f4cbcecf96216bc4b20e4272af6350b04098c73133284b739e24a3a807
pdf-font-stream PDF embedded font (sfnt) at offset 0x1029D 17492 bytes
font_02_sfnt_off0001304a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1304A 16792 bytes