Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1c07ffce6075af6…

MALICIOUS

PDF

97.9 KB Created: 2021-07-04 07:07:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 482e22d772a65dbc01a81d62a743f320 SHA-1: 342b63ee0c337e3ae82ecc34d06403ba41146da0 SHA-256: a1c07ffce6075af6d9b5e33952136e15cd5e6eed1628b705a50f802f37c55f29
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links, many pointing to compromised WordPress installations, suggesting it's designed to lead users to malicious sites. The PDF itself does not contain readable content, but its structure and embedded URLs indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

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 http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089bc931ba6e---jipapefufabuzalinizegen.pdf
    • http://macautemple.com/userfiles/file/68452582386.pdf
    • https://protechlighting.com/wp-content/plugins/super-forms/uploads/php/files/c9fb1da8c901760abe4d57b59989b3c2/94661712492.pdf
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/c2c3nudljf692o6cl775a9pbp6/gotowuwefiguraje.pdf
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1609306773d7aa---47398798782.pdf
    • http://aircond.md/upload_fck/file/87162297934.pdf
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16090c3cb1665b---49242662975.pdf
    • http://amdind.com/userfiles/file/14773766018.pdf
    • http://aklond.com/UploadFilesfile///2021050408484562.pdf
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c0d6bef5b5---ladatodu.pdf
    • https://mercerapparelss.com/userfiles/files/rufopaxezazex.pdf
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/0b7dd93d355351ae58c7c410017c2f66/2712763483.pdf
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/jb4qi863p7marfr97oopjtrvs2/7591511262.pdf
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607de7e4afccd---29504276115.pdf
    • http://alexhofford.com/temp/files/file/37563630840.pdf
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/23461a3e4251dbedd830212e57544138/83270072906.pdf
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d338b4c0f7c---noraluxojola.pdf
    • https://autoroman-service.ro/imagini_ws/31329837378.pdf
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607b760b02eec---57688418264.pdf
    • http://xn--80aamdqpfpr.xn--p1ai/upload_picture/sutekapedilagejepa.pdf
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a84c83b90f0---begogik.pdf
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/43a89ed03ecbbeca0d1835d54fe0aa32/zixijilibatexedotusipi.pdf
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/62c700b11a441f22c3f0fd7f9c87f8ef/48185572874.pdf
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/m4e93p9tvk5crmmiej11lbtm87/pimazetebexaxuxarosowinim.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=history+of+writing
    • 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_off00011b3a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11B3A 16792 bytes
font_01_sfnt_off00013351.bin
55cd4881d115a96992862abdb98979ec3c09e560b1e7786b7868050e9ee23dd2
pdf-font-stream PDF embedded font (sfnt) at offset 0x13351 10240 bytes
font_02_sfnt_off00014a7b.bin
18e776289f7199e0d6412a53f0c72b484dfad5db9d1a54f95c53d9342eba01ef
pdf-font-stream PDF embedded font (sfnt) at offset 0x14A7B 18224 bytes