Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2569235ea44b475…

MALICIOUS

PDF

157.2 KB Created: 2021-07-18 23:34:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fe24077fa7073f364ce902c4f845dfac SHA-1: 19d8f10aa36d076fc2fb1a892551b17623552df9 SHA-256: d2569235ea44b4755bb72e3e55579edf051ea802a32f931f892918e213fb4a91
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to compromised WordPress sites, a common tactic for distributing malicious payloads. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to open a password-protected archive, a method used to bypass gateway security. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://spoanalyze.com/wp-content/plugins/super-forms/uploads/php/files/49333cb7ecab7ddbd833bd980be226ad/52210977099.pdf
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/595d654ee6a696727ad57c5559f94605/57752376323.pdf
    • https://xo-sound.ru/userfiles/file/99113150303.pdf
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ee8cb93548c---noxumesijide.pdf
    • http://ahcxdq.com/uploads/file/280147218395.pdf
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16084947e95484---raxijosalipovi.pdf
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/16087c84894e12---diribexagasefegeka.pdf
    • http://asdgolfclubtoscana.com/writable/public/userfiles/file/molijojal.pdf
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607bbe5c4829b---povekozepuxufenadododabig.pdf
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/193cea8112d6ca86504c206975d3cf54/5628342971.pdf
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/c4k8clmueuvvio6ou4utbee8l2/zapegigofifepifanaw.pdf
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/a8e2b3499f7924b48159b61216112630/63987607913.pdf
    • http://aksaaydinlatma.com/img/editor/image/file/muxopin.pdf
    • http://akkoryazilim.com/userfiles/file/wejoduwit.pdf
    • http://eksan-ltd.com/userfiles/file/najifepudexevararef.pdf
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/f772252e434a4d192b59aef7b115a407/vukawatufu.pdf
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2d0acc1edb---judibet.pdf
    • https://warungmimpishio.com/contents//files/worelikilusa.pdf
    • http://maslag.eu/userfiles/file/43529818781.pdf
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/705a2651d25e31c4bbe580db46eb72c3/23612733279.pdf
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/d2ae32215e50c9487a5e20fe11d3d9d3/maziwit.pdf
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/cghhtnuhoj29701odvgdsl8c87/38399310460.pdf
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608befb83f6d1---zibebiwo.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=tri+cities+groundskeeper
    • 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_off00020825.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x20825 16792 bytes
font_01_sfnt_off00022037.bin
ed10f70c46e53f32628f719a255021e4298387c3ea2d3d8b2588d3d5a6f90f74
pdf-font-stream PDF embedded font (sfnt) at offset 0x22037 17972 bytes
font_02_sfnt_off00024f43.bin
3952a1f7a74163f6e331485fe24a7d33c5cdc0e1b1134bc43efcc3fd767e69cd
pdf-font-stream PDF embedded font (sfnt) at offset 0x24F43 10636 bytes