Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf29cd57638c7555…

MALICIOUS

PDF

79.8 KB Created: 2021-07-07 23:21:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4f580e9ba225953fc47d3596d6020d79 SHA-1: 808866d79c39bff333e77f3e5e17148b05c271ea SHA-256: bf29cd57638c7555e530059c8f4618e55a13ab0b8ddf4369c81d4cfba3317fbb
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous links to compromised WordPress sites and disposable hosting, suggesting an attempt to distribute further malicious content or phish for information. The presence of a 'download button' lure reinforces the deceptive nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://oniceh.ru/uplcv?utm_term=new+year+cartoon+images+2020
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/pqmpvd7ploh1nruam7hppaosk4/66676658707.pdf
    • http://3suntech.com/UploadFile/file/20210626040539147.pdf
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/ecfcb6e32fe1dcbdd2a5d6d9c0220a35/94790441236.pdf
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160a81366d7115---87260627060.pdf
    • https://walterchiropracticclinic.com/home/walter/public_html/ckfinder/userfiles/files/67072992662.pdf
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/4fak2qg4qtlio5jvvlbu64mag4/85980364920.pdf
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/fd54141cfb7044965e446ab0cbc67b49/terutojufab.pdf
    • http://xn----8sbnbd9chja.xn--p1ai/userfiles/file/60018698539.pdf
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160b8de63a7094---72558132959.pdf
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8f949b98b---kazomowiboruluwikifix.pdf
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8d58116ed---72581028136.pdf
    • https://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/1g7tbcum9qbrf4ak7ts6n4ld7j/vazepusep.pdf
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/h5m79ev9enjduqk4h7tbj73ej0/mezadixumanorokunevupeg.pdf
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/b434vdmusbulfadrccks0ftru6/36935001516.pdf
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160940aba331a9---40276780224.pdf
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160740db0efd3d---begozolobunowu.pdf
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b97bc7d2a2f---13304430916.pdf
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/16076e7f157f7c---14877945888.pdf
    • https://harrisitalia.it/uploads/file/jexufepegunezuxi.pdf
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16083ee26e1a1c---48197370802.pdf
    • 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_off0000d497.bin
f579f6e991cd4c7d1accd3c9fa34b97820531423769a2a1eb1a7957fb3f51929
pdf-font-stream PDF embedded font (sfnt) at offset 0xD497 16864 bytes
font_01_sfnt_off000100cb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x100CB 16792 bytes
font_02_sfnt_off000118e2.bin
f29638291f973658e89c287a42d7d0ec3a93e48765d919ba8cdaadb731fec677
pdf-font-stream PDF embedded font (sfnt) at offset 0x118E2 10948 bytes