Malicious PDF — malware analysis report

Static analysis result for SHA-256 e247df73da23e72d…

MALICIOUS

PDF

69.7 KB Created: 2021-09-28 10:34:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 0ebfcd0ce1713d0f1a38d027acb5571e SHA-1: 7332ecf421d9bf98c576a2c89214bc1088e34d37 SHA-256: e247df73da23e72d4565231fa4ee1427f05bfd9dee81a55b371952f88a6d47ee
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs that point to external PDF files, suggesting it acts as a link farm to distribute further malicious content. The presence of 'utm_term' parameters in some URLs indicates a potential phishing or scamming attempt to lure users with specific search terms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 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 http://siblom.ru/files/upload/file/42457386816.pdf In PDF document text
    • http://tottazo.com/userfiles/file/badazewurupemiter.pdfIn PDF document text
    • http://oasishs.com/uploads/files/20210907_162006.pdfIn PDF document text
    • http://flixgolf.com/ckeditor/ckfinder/userfiles/files/32083993925.pdfIn PDF document text
    • http://halaljones.com/uploads/files/sogugovezitogavive.pdfIn PDF document text
    • http://tahi.hu/ckfinder/userfiles/files/14255839973.pdfIn PDF document text
    • http://carsonpokebar.com/uploads/files/56972011241.pdfIn PDF document text
    • http://jocoseatee.com/userfiles/files/zekikita.pdfIn PDF document text
    • http://neapol-m.ru/usr/file/74057849542.pdfIn PDF document text
    • https://www.hsbofmn.com/ckfinder/userfiles/files/rexewamoj.pdfIn PDF document text
    • https://obermeyer-modemarkt.de/upload/file/matupopilawedanave.pdfIn PDF document text
    • http://sanarina.de/ckfinder/userfiles/files/83034369057.pdfIn PDF document text
    • http://irvinenott.co.uk/ckfinder/userfiles/files/96756006083.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/50579794378.pdfIn PDF document text
    • http://modulobase.com/userfiles/file/zivagemativotaligemawi.pdfIn PDF document text
    • http://mikllc.mn/uploads/files/86520951520.pdfIn PDF document text
    • http://archissimo.eu/userfiles/files/63663835427.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613ef6c238693---6335743912.pdfIn PDF document text
    • https://bestcoloringpages.com/userfiles/file/80861365865.pdfIn PDF document text
    • http://yuanyoujie.vip/userfiles/file/47230030715.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/wevugupifafawajomosirupox.pdfIn PDF document text
    • http://ageddfjtj.pretty-match.com/upload/files/mivezenejavodafojezig.pdfIn PDF document text
    • http://fuerst-architects.com/uploads/file/83953742931.pdfIn PDF document text
    • https://signika.pl/Upload/file/wunatopadanuxi.pdfIn PDF document text
    • http://imobilestore.de/userfiles/file/82871625284.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=pokemon+ultra+moon+rom+downloadPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b3d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3D0 14884 bytes
SHA-256: 5781b0028c47ffcc3c7e8996736e5c9d208cb21fe113dc88b36d6f27e405937e
font_01_sfnt_off0000d91f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD91F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF136 10428 bytes
SHA-256: 9984b16684b918a2730210b2ed96219a1e56508d8791b855dfb8ceee42b8daa2