Malicious PDF — malware analysis report

Static analysis result for SHA-256 12d89e136e9cc95d…

MALICIOUS

PDF

89.0 KB Created: 2021-07-05 18:25:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c4b3d1d9fb33c4b77e289638f20ceb78 SHA-1: a87f86ad84b43c92dcf29c2efd71d64666b1a0f8 SHA-256: 12d89e136e9cc95d72117e208eec3147f9487236429462d25efbf6ebcc47c97b
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded JavaScript and a link farm pointing to compromised WordPress uploads suggests the document is designed to redirect users to malicious sites. The heuristics also indicate the use of urgency lures, further supporting a phishing or credential harvesting attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://glotecgh.com/upload/editor/file/17001171513.pdf
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/a3jr5sm1n24117hn1dhmn9o0jg/4725612825.pdf
    • http://maristaslardero.es/userfiles/file/wefaruvuvazo.pdf
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/1609009e295e6d---tatelipenijepezifaxifiz.pdf
    • https://airflow-skateboards.com/upload/file/lazizitubobosemusedomof.pdf
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/d4c6cbp5tmd7a7jf1tnch8julu/xeliv.pdf
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/f5af4141657514db057ccfebf62ad0e2/14642121945.pdf
    • http://serextion2006.com/js/upload/files/tuvati.pdf
    • https://bem-sa.com/img/file/75925504791.pdf
    • https://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/oicqnpjr00mdur1e7n0ht75i38/pinatoxoz.pdf
    • http://bowlinggreenhsclassof66.com/clients/b/bd/bdf8ab256cd88a603fc2b95a051c5839/File/7137355556.pdf
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba9889eaa08---61012965868.pdf
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/rclsp5avbn5sialum1u9j00isa/gegebefu.pdf
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/90ok2s8r63f12igjqdam86mijh/26350050058.pdf
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b22443bc13e---mowosegumu.pdf
    • https://fuchscars.com/wp-content/plugins/super-forms/uploads/php/files/96401ff84e9e7ea9a948a0d58b658aca/fenaruraledakusoj.pdf
    • https://vietnaminsight.biz/ckfinder/userfiles/files/biwejakexikofilofime.pdf
    • http://chetaomaynganhnhua.com/uploads/files/wogedojopofuwexasexuwa.pdf
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/91042eb36dc4a98b793540bd2c68caf2/gixizitita.pdf
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/69rebik2vdulq7ffnfm24rnvga/35141276565.pdf
    • http://www.peretprod.ro/content-images/file/jukonirulawiligel.pdf
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/kg4vcjl6sser453qj5hgvh97r0/sezimovimizedaloduxuz.pdf
    • http://clarkhigh72.com/clients/3/34/34275c7d49a174b5f6cf03bf5966da6c/File/75650656483.pdf
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bcc8550ac36---25200834142.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=gdpr+features+72+hours
    • 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_off0000f8d2.bin
681e6595b8ca3d5445fed54c25eecb6357c0e34d0c5c3f3adabacbf285277fcb
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D2 17392 bytes
font_01_sfnt_off000125f9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x125F9 16792 bytes
font_02_sfnt_off00013e10.bin
07cff0edf0e4b0422bd9ee2eed326d461ff6a8c883a810f5c4f030bf25e4b817
pdf-font-stream PDF embedded font (sfnt) at offset 0x13E10 10664 bytes