Malicious PDF — malware analysis report

Static analysis result for SHA-256 451fc570b5394cc0…

MALICIOUS

PDF

70.3 KB Created: 2021-09-07 22:51:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 58eec01156257e71b980d994539eac8d SHA-1: 741e4796f3dbf3568ec3b74de5e5122a748d07b9 SHA-256: 451fc570b5394cc094ce38ac16e886f592d9428bc926106e09cb00a3df952f28
154 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting, suggesting a link farm designed to redirect users. The primary purpose seems to be directing users to potentially malicious content hosted on these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9130

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
  • 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
  • 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://sportsht.com/userfiles/file/voxefojo.pdf In PDF document text
    • http://www.srijonihealinghome.com/fckimages/file/73016420988.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3a6a250cd---94609836587.pdfIn PDF document text
    • http://kleinschaden-expert.de/userfiles/file/disafazawego.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/1ea3c90a14b2f37c852f293d42cf6957/73643837196.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e83c297298---kusarutot.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa3a183e99---fonikamitijukejosamutela.pdfIn PDF document text
    • http://www.huntsvillepr.com/files/files/60377140395.pdfIn PDF document text
    • http://dailymaydemtien.com/userfiles/files/mumazik.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb78dfd94e9---vokujimokarisugal.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c93d70cf463---vejerasan.pdfIn PDF document text
    • http://licausi.it/userfiles/files/10416012539.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ab5dad09d6c---56082343584.pdfIn PDF document text
    • https://fceresources.com/ckfinder/userfiles/files/lakevezuzesojulavenajemod.pdfIn PDF document text
    • http://2440027.ru/upload/file/57429332493.pdfIn PDF document text
    • http://www.ecostroyservis.ru/File/57915776116.pdfIn PDF document text
    • http://bhartiyambeohari.in/userfiles/file/riwiwejezasevezoruxo.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/8d863c374a887b90b7004757d24a87b7/39256576315.pdfIn PDF document text
    • http://handbook.hu/upload/page/file/51236660908.pdfIn PDF document text
    • https://camelcarpet.org/d/files/maluwikosazokizuma.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/d19c7fd13dbc1389757a5d53f821a481/poworelazexalidevoj.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/dt596of7qqha91iaa0c0nj6r47/80579172220.pdfIn PDF document text
    • http://uniradioweb.info/userfiles/files/70012863410.pdfIn PDF document text
    • http://chuanghuilaw.com/filespath/files/20210829132001.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=lycidas+analysis+pdfPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f7cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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