Malicious PDF — malware analysis report

Static analysis result for SHA-256 674e0b9eedd2fd0d…

MALICIOUS

PDF

92.4 KB Created: 2021-03-19 03:46:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 1824b8b9f0f901962e14fb41507b74cb SHA-1: db52c6dda8f3f05c2b7716d3bc44b04388dbc292 SHA-256: 674e0b9eedd2fd0d461c2a19c9f329017520f8b9b67d35af34fc37ff0e3f2b06
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, many of which point to disposable hosting and appear to be part of a link farm, suggesting a phishing or scam campaign. The document body, though heavily obfuscated, contains keywords related to weight loss products, aligning with common lure tactics.

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 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://seumenha.ru/wix?keyword=marathon+keto+pills+walmart PDF link annotation
    • http://kigalasabipigo.medianewsonline.com/jiviwud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462036/normal_60461d634df25.pdfIn PDF document text
    • https://cdn.sqhk.co/lemusezilaz/ehejeTf/43779014821.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469350/normal_5fca7ef64f39d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417526/normal_600d2f86d81f8.pdfIn PDF document text
    • https://cdn.sqhk.co/bidelefo/Cdjb5ih/emoji_keyboard_cute_emoticons_theme_gif_emoji.pdfIn PDF document text
    • https://cdn.sqhk.co/kimejijomaki/Vijigig/31073954079.pdfIn PDF document text
    • https://cdn.sqhk.co/duwewofowus/hhjg1sa/pebowalobuwu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417213/normal_5fd1e01ad4fec.pdfIn PDF document text
    • http://vumajuzatijerak.getenjoyment.net/inside_micrometer_calibration_procedure.pdfIn PDF document text
    • https://cdn.sqhk.co/vemonososepa/ukJohdO/domalonine.pdfIn PDF document text
    • http://zixudivibudizu.scienceontheweb.net/slimming_world_free_foods_book.pdfIn PDF document text
    • http://fofiwafajelerax.sportsontheweb.net/dusajafasax.pdfIn PDF document text
    • https://cdn.sqhk.co/guzowozuk/iiifgjT/kapipodakafesezomobaxa.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvurero/gjgPqny/trending_hashtags_on_twitter_in_kenya_today.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423471/normal_5feff95f5436f.pdfIn PDF document text
    • http://lezofifividex.scienceontheweb.net/90870717605.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zasuwunal.myartsonline.com/february_2020_marathi_calendar.pdfIn PDF document text
    • http://zuxokoberibaw.atwebpages.com/zaxuboneriwozapexum.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_off0001311e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1311E 5220 bytes
SHA-256: dbde7bc1a47563fdd641063169143c45c0419abf6c355bfb49ae1a40aaa1efd7
font_01_sfnt_off000142cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142CF 10016 bytes
SHA-256: 84a3134718b79d4e78be39ef14aac56e5badab2cf798d5f580c04b6e988c006c

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