Malicious PDF — malware analysis report

Static analysis result for SHA-256 6de224f7340c363e…

MALICIOUS

PDF

86.5 KB Created: 2021-07-03 19:25:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2d269812bdc554f50235afe376a14e69 SHA-1: 94192499c9c224fdf62df95ed25420ac954887ed SHA-256: 6de224f7340c363eb77c790e8dd6c1390fcf6fb068491f19c1b5933293a86408
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to compromised WordPress upload directories, suggesting an attempt to disguise malicious redirects. The presence of external URIs and the nature of the heuristics indicate a likely phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/2mlh96aa0oae8rfvk332huc615/nivakuvawulujisi.pdf
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bd623a387a1---21935699750.pdf
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/13adc65bcf2fd66faee59ff1bc253329/61750695272.pdf
    • http://huntland.hu/upload/file/dubavuzudifulilu.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/9ef0b533c514d12ff1b62539f0bdce66/duzejixoke.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6a9q7jk7h6tot4c9vu5mtraq95/38027809170.pdf
    • http://merwepizza.com/upload/file/88744630548.pdf
    • https://hondamienbac.vn/userfiles/file/sokopek.pdf
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/28t7kcq3s9gj8lourvvac8qu0d/10372068974.pdf
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160ce7c94265e3---45688553957.pdf
    • http://tnslib.net/userfiles/files/84185831710.pdf
    • https://adepotcustom.com/UploadFiles/file/20210507184611131.pdf
    • http://adveotec.com/img/file/kudozulenokuwigudumefatir.pdf
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/16099ecd733dc9---98804255832.pdf
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160991f275eec8---91304110013.pdf
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/b47ac30e7f87c7241804712d90daf081/fidenik.pdf
    • https://rm-parketi.si/uploads/89964932754.pdf
    • https://cashcruis.ru/wp-content/plugins/super-forms/uploads/php/files/e972916fd8b22b697c11248d648454ea/8533183719.pdf
    • http://accessprecision.com/userfiles/file/kavemidi.pdf
    • http://goodtraefarm.com/ckupload/files/fijadirogame.pdf
    • http://zeguvietnam.com/uploads/ckfinder/files/46194327801.pdf
    • https://stijsr.com/userfiles/file/19467890104.pdf
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/mo9pqu264mmam5sqkr83sh5i85/vobekivuliwisokejejukugar.pdf
    • https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/2qhvtjebimfgfcpu1d5sn4vrs2/tigezubunibedubixe.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=how+to+mix+green+gold+watercolor
    • 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_off0000f071.bin
bc8729946504a5b73a5fef4b339073d1f12432be5dfd1ace982e648aabc91e2a
pdf-font-stream PDF embedded font (sfnt) at offset 0xF071 10724 bytes
font_01_sfnt_off000108cf.bin
598d8ac0cc57938c8b682a279e09367b40e36a9d94bca70ee28fef7fd2020a71
pdf-font-stream PDF embedded font (sfnt) at offset 0x108CF 16968 bytes
font_02_sfnt_off000134a9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x134A9 16792 bytes