Malicious PDF — malware analysis report

Static analysis result for SHA-256 155c600611b75259…

MALICIOUS

PDF

92.5 KB Created: 2021-06-29 10:46:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2f48e0e6e63c028ac98606fea8c4a45d SHA-1: 9b50ab1f3d4e0a641d4a1f3caafc04d399f513af SHA-256: 155c600611b7525920825ee346542389e4ed1bafe2fe9f9835f248c851948167
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to compromised WordPress sites, suggesting it's part of a link farm designed to host malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs and the 'Canada Post lost package' lure point towards a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/3c209d7ba127f0d3d78a30784b85818b/72921835716.pdf
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0501fdb7a0---dokogafuforu.pdf
    • https://bdsvieclam.com/upload/files/71026140446.pdf
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8973ea8621---gofemukijefovurunabewo.pdf
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/l7fide3mbpk68smdf1icstgo8r/14713812978.pdf
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/qbotfi6n457ser5u2ei2pkmh5u/lezimagiw.pdf
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/6832fd573a0945dcf3c3c1358d103180/nunatepogivijafowol.pdf
    • https://mebelihome.ru/upload_picture/lesedotaniwu.pdf
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a8ca71ba064---2010868893.pdf
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/e335617e0f2f9447c56124ab2ab2ee11/viwopeguwebapiwopadadazu.pdf
    • http://cnzhongkui.com/fckeditor/editor/filemanager/connectors/php/uploads/file/032027321462.pdf
    • http://bygreenpure.com/userfiles/file/panifowa.pdf
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/e223cb390a1463faa62f8f5eda4add07/52478619610.pdf
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/n4qbn7tvjf81kl76mt6bjl7bt3/wamiked.pdf
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/0j01mhco83l7vjrvkli03tm692/jitizaweri.pdf
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/c5b3f67c0b23db040a971d8f744f78cf/regaberutozanijilo.pdf
    • http://drive4smilesontario.com/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/kixezufifijafegaxam.pdf
    • http://aarogyamedico.com/userfiles/file/15959394503.pdf
    • https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/b4f5cc617694c2516278fc94ce08b4eb/logamutosomupil.pdf
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/2c20de4f80104c385c18cc309ba5d7e0/66068398014.pdf
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a9d27ad7ac---57732556410.pdf
    • https://vivaldiroberto.com/img/files/mediafiles/file/56511284879.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=canada+post+lost+package
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f06a.bin
75b586f21231a4504bd8518f65a798e04f1d3736e1680262625002f5996a6364
pdf-font-stream PDF embedded font (sfnt) at offset 0xF06A 16100 bytes
font_01_sfnt_off000105b7.bin
3dff35ab23028fdb552d1de2c9823623d126e38be72abec79ce4489847677af2
pdf-font-stream PDF embedded font (sfnt) at offset 0x105B7 17452 bytes
font_02_sfnt_off000133fe.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x133FE 16792 bytes
font_03_sfnt_off00014c15.bin
4afdd35de7129ca68ee75aea44742b8ed987775d54391b656a94ea0b8a7ad250
pdf-font-stream PDF embedded font (sfnt) at offset 0x14C15 10620 bytes