Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea6ac56562f70f6b…

MALICIOUS

PDF

72.7 KB Created: 2021-03-17 18:16:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: defec862e45a06f15dec45d0aaf062e0 SHA-1: d17d1f7f03e4cf3929c6a519503c5f454f3c52f9 SHA-256: ea6ac56562f70f6b54b9a0081e45e6acb8c83e7e684170c80c5854ad58ab6b7a
184 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and a machine learning classifier. It contains numerous embedded links, with at least one pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, suggests a lure related to hardware upgrades, likely intended to trick users into visiting malicious sites for phishing or malware downloads. No scripts were extracted, but the presence of malicious links is a strong indicator of an attack.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/wb?keyword=hp%20probook%206560b%20ram%20upgrade In PDF document text
    • https://cdn.sqhk.co/badaxiloru/fbgdhe0/pexurulogubofepabo.pdfIn PDF document text
    • https://cdn.sqhk.co/sugifila/UhaCigV/51449915869.pdfIn PDF document text
    • https://cdn.sqhk.co/pamavunawi/j3hdmjd/72495126452.pdfIn PDF document text
    • https://nekamefirojes.weebly.com/uploads/1/3/0/7/130739169/legobozu.pdfIn PDF document text
    • https://romenugerod.weebly.com/uploads/1/3/5/3/135317494/2009312.pdfIn PDF document text
    • https://domisupufiz.weebly.com/uploads/1/3/5/3/135316273/gulegupukogolep-mevelesel-wabipak.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465025/normal_5ffde4a7ed7bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366965/normal_604a583390c97.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500674/normal_5ff065a2de6a8.pdfIn PDF document text
    • https://cdn.sqhk.co/nowavutu/jDWjbwA/movies_anywhere_app_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448556/normal_5fddf7af5f691.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448991/normal_6015161665326.pdfIn PDF document text
    • http://lebizifijafaxim.medianewsonline.com/mecanica_vectorial_para_ingenieros_estatica_10_edicion_beer_espaol.pdfIn PDF document text
    • https://pozefixinez.weebly.com/uploads/1/3/1/4/131454190/zelinegoriban_simewexuwubo_vedipilujoz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/geraromu/44491219565.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/bupopetobofobuku.pdfIn PDF document text
    • http://mikijanux.atwebpages.com/philosophy_of_science_journal_abbreviation.pdfIn PDF document text
    • https://s3.amazonaws.com/zalisujezajaje/39621895500.pdfIn PDF document text
    • https://s3.amazonaws.com/tiduro/titoror.pdfIn PDF document text
    • https://s3.amazonaws.com/zowibatev/78608939415.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_off0000db86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB86 5652 bytes
SHA-256: dfee80fb3ede9732ae1c3bb931e599b990a6122d187a1e99053c50aea954fef5
font_01_sfnt_off0000eea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA2 11800 bytes
SHA-256: e05a61de49f623e547620dfe6d473383e35c6b9bd40e1652f1571eef307fcfca

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