Malicious PDF — malware analysis report

Static analysis result for SHA-256 220982e6017f6b98…

MALICIOUS

PDF

120.3 KB Created: 2021-06-12 10:43:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dcd58f800e91d929a3a8ac57aad35014 SHA-1: 2a9bf75b4d72f6775d993c0de937574ddf70b721 SHA-256: 220982e6017f6b9802b601bd507ce294f5f81d57fc1c88dcf25073570893ef01
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to compromised WordPress sites and other disposable hosting domains. The embedded URLs suggest a phishing or malware distribution scheme, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://garglob.ru/uplcv?utm_term=cbrn+1+observers+report
    • http://furniture83.com/upload/files/zujaxebudikutosuwabefu.pdf
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/38cd68c248d95ab75da049ad514c4844/gajixi.pdf
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c2dce026ffd---somoripotonisefe.pdf
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/2aabda65fb62632bcbb39bcf16d24a06/67659571009.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160884d7b5d868---futikutodel.pdf
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/71lhd7tm18brnnhj85b3qlh39j/keminazenusijogowa.pdf
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/ao22rlv957uahfs5cvef50dd52/naveposidaxejolabisekib.pdf
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/7a5is3mi9ooi53h57lf4jh8tsl/rupawema.pdf
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/bfecad132e7b3191fb0621e1071b161f/miwipisipozomazoruteneg.pdf
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ad97486ea09---69355991958.pdf
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609cc409b592e---xewol.pdf
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/6eaa5a47f55b8e867cb1cfe633c08d57/21435557577.pdf
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a3b6ef28cc2---mazunu.pdf
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/e4b13737775c256144e60b118da2c16b/namopi.pdf
    • http://kagoshimakojintaxi.com/userfiles/file/fobonojibixojekujo.pdf
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a3ad3f92b6e---gugexumudofuketedak.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00019dab.bin
f6f9f8a5043833ce00de309932ccc5b7c0caad0c010351f3462db64a642d3938		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19DAB 4728 bytes
font_01_sfnt_off0001adce.bin
d5da8c3ea34e6f51e7ca673d476f6b60791a0484822f84e173ee121d33d28c67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1ADCE 11396 bytes

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