Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6d2ef649328df98…

MALICIOUS

PDF

101.2 KB Created: 2021-07-05 18:59:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 43f2d9dd9f2f19f937663885291ad76c SHA-1: 6537fcd394997c8f9fbb9ddccfde0dfdecbca104 SHA-256: e6d2ef649328df98b9a639e52cd0441c8534d5d636696b470e56fdf8e04e2f30
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of a phishing lure. It contains a link farm pointing to compromised WordPress upload storage, suggesting an attempt to distribute further malicious content. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely provides instructions to decrypt a password-protected archive, a common tactic to bypass gateway security.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/3f8c7d9cb3e7cafe45df22eb6268f251/getodivafesoruvoxariku.pdf
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/shnhb2qenvbselbtj02hns14e6/niwefakaranivulogupuriri.pdf
    • http://e-pisanie-prac.pl/famprojekt_z_serwera/images/file/lixizefoguxabojujutavire.pdf
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/c23d415f118bcbbc56dbbcc59a0981d0/17218295115.pdf
    • https://www.demetagras.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d45058d94b---gofasavedilexerux.pdf
    • http://muskogeeroughers1967.com/clients/9/98/9899c641331876fb313f08ec475a0443/File/30698342349.pdf
    • http://coalcreekcentenary.com/clients/5/52/52f735e63eff8706e1a2a73a20aef632/File/gebopefibuxifozusevefa.pdf
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/98159c83929a140bd3622fa0682cf221/wogim.pdf
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dc5e956e63---junokedunovoxafibiz.pdf
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/fa3801b7b19d1eb680f9b904a5ab0203/latimesopexajuvakij.pdf
    • http://braciszewska-klimek.pl/fck_files/file/43972419940.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/nurj8cg3lseaf1paqbbpi539e0/jarakavuzulupen.pdf
    • http://mispuntossaga.com/campannas/file/jegefiregaranafugukabonez.pdf
    • https://tiklatakip.com/calisma2/files/uploads/kunomom.pdf
    • http://beiwendq.com//data/attachment/file/zaxesolesizu.pdf
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ab60203e11e---wavibefumob.pdf
    • http://www.allatpatikapecs.hu/images/file/soruli.pdf
    • http://phuvuongcorp.com/luutru/files/51473112105.pdf
    • https://strategieb2b.com/userfiles/file/13710502058.pdf
    • https://bostaninsaat.com/image/files/diriwosogudodoxiju.pdf
    • https://ssvacancy.com/ckfinder/userfiles/files/58615135751.pdf
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160aaeddacbb40---fulojabe.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=how+to+make+a+single+piston+door+in+minecraft
    • 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_off00012171.bin
8c87f7b125d3c7406855094493952535c18a9f85d148a36beea3fc15acdfd6a5
pdf-font-stream PDF embedded font (sfnt) at offset 0x12171 11132 bytes
font_01_sfnt_off00013b33.bin
2833cd772a75640c8486487abc5a8c9b2f1e10222d1473e3a11eb996618acfda
pdf-font-stream PDF embedded font (sfnt) at offset 0x13B33 18972 bytes
font_02_sfnt_off00016daa.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x16DAA 16792 bytes