Malicious PDF — malware analysis report

Static analysis result for SHA-256 80137f27f0daa592…

MALICIOUS

PDF

73.9 KB Created: 2021-02-27 03:24:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 587dcf8b618efc12e9c557c754522357 SHA-1: 31ae842ce80c59f6104d0c4083dbfc3af8689d52 SHA-256: 80137f27f0daa592a91abcc241a3a39108a4ed12daf2e5d69d0ca9e978fe8a8e
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified as a link farm, with the primary URL pointing to a suspicious domain. ClamAV detection and ML classification strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/award?keyword=stephen+hawking+young+interview PDF link annotation
    • https://wugupuvexiso.weebly.com/uploads/1/3/0/9/130969254/paxojezuporejon.pdfIn PDF document text
    • http://vaxuzorokolate.iblogger.org/absa_premiership_fixtures_2019_20.pdfIn PDF document text
    • http://sunakijabe.sportsontheweb.net/75844507387.pdfIn PDF document text
    • https://jaxikagiwuzeno.weebly.com/uploads/1/3/4/6/134698588/6250559.pdfIn PDF document text
    • https://bitojobuf.weebly.com/uploads/1/3/4/8/134892495/xuzinuf_demarudebuloze_fukepumevi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bibirosomuxir.epizy.com/bulletproof_diet_book.pdfIn PDF document text
    • http://zudozam.epizy.com/miguperafofixegibakipul.pdfIn PDF document text
    • http://zatuvejamubolo.atwebpages.com/neil_gaiman_sandman_series_netflix.pdfIn PDF document text
    • http://dinilemave.epizy.com/analects_definition_in_history.pdfIn PDF document text
    • http://tatoguninorevem.epizy.com/16021021099.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/boforegajupeduk.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxepiduded/moxasitipuzudekekivanu.pdfIn PDF document text
    • https://s3.amazonaws.com/juwofuxufijup/math_worksheets_for_6th_grade_fractions.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/57495172897.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_off0000e4cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4CB 5292 bytes
SHA-256: 81183ea5aacc49fc6c2c6cbf08ac8dc414155f4a4fd6faad6ed10f604ae74443
font_01_sfnt_off0000f6e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E5 10460 bytes
SHA-256: 5f2f5a2207144ea7b4df9bc2ae129181845d0d876992233604ee70f635a9968f

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