Malicious PDF — malware analysis report

Static analysis result for SHA-256 6366a267c21cbff0…

MALICIOUS

PDF

76.7 KB Created: 2021-02-24 09:40:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 1778d027664e8c1196fd248d3f6fba06 SHA-1: 3dd3bbc7a12e3eeee319af39a53ec7570b73160e SHA-256: 6366a267c21cbff085f57b0c12c44685950e3c482d896a21eab23961bdbb15f7
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO poisoning or phishing. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, and the 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' firings confirm its malicious nature. The embedded URLs suggest an attempt to redirect users to malicious sites, likely for malware distribution or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://leonvi.ru/wix?keyword=mahoning+county+auditor%2527s+site PDF link annotation
    • http://thestablestl.com/bisuzomuvawpt5b.pdfIn PDF document text
    • http://naturfresh.fun/ala_baburao_dj_song_marathirs5xm.pdfIn PDF document text
    • https://gigotuvo.weebly.com/uploads/1/3/1/1/131164366/napebexinifazat.pdfIn PDF document text
    • http://damita.fun/kumon_3rd_grade_math_worksheetspcaxk.pdfIn PDF document text
    • http://lnstagram-copyright-confirms.com/que_es_un_fotografa_documentalzhptn.pdfIn PDF document text
    • http://kipivejezijab.iblogger.org/zorezapulu.pdfIn PDF document text
    • http://springital.fun/675275895850yohn.pdfIn PDF document text
    • http://reduslimitaly-official.site/80251479911xv8ep.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vomifavub.epizy.com/gourmet_guide_restaurant_vouchers.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/70616377198.pdfIn PDF document text
    • https://s3.amazonaws.com/murudute/50053655131.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/6840758143.pdfIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/fema_ics_800_questions_and_answers.pdfIn PDF document text
    • http://zekarevuwo.epizy.com/how_to_include_bleed_in_indesign.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/80565175415.pdfIn PDF document text
    • http://logiratawune.rf.gd/6404650444.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FC 5308 bytes
SHA-256: b0599eaeaff9ace01fdd00b02f9899e6470ecae124a15ba7118b9e55050c4dfa
font_01_sfnt_off0000fc20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC20 12876 bytes
SHA-256: f6b3fd7a8dbe9447c3965a16909a6b0f8538f000a0132a2b8c89310cf8504f36

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