Malicious PDF — malware analysis report

Static analysis result for SHA-256 3400c62116363247…

MALICIOUS

PDF

71.4 KB Created: 2021-02-21 04:53:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 929d1a6684ae1df2c4ca57d855bc8d30 SHA-1: 54789c8681a422d4308313f77c23c9b8303ad3ec SHA-256: 3400c62116363247aab17e6bbb06db8c48ea8ece4314bc4c914d5c50503c22d1
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://jacksth.ru/wb?keyword=how%20to%20care%20for%20a%20stroke%20patient%20at%20hospital PDF link annotation
    • https://ribosotegolexo.weebly.com/uploads/1/3/4/0/134013239/5389320.pdfIn PDF document text
    • https://cdn.sqhk.co/jarixizotib/SKu1Yii/luvatajukojip.pdfIn PDF document text
    • http://serdyukov.pro/kekoxuwqzg.pdfIn PDF document text
    • https://cdn.sqhk.co/jojevirelo/nChjiiq/zoluxokilevam.pdfIn PDF document text
    • http://homiak.fun/15951391400hu7wd.pdfIn PDF document text
    • http://workmonster.net/33760442857eely9.pdfIn PDF document text
    • https://cdn.sqhk.co/ragojagef/ghbbrji/23670093882.pdfIn PDF document text
    • https://cdn.sqhk.co/zifuvifiweva/gLgfgji/mojuxaguzorefubaped.pdfIn PDF document text
    • https://cdn.sqhk.co/jagavibejabe/gejjKgc/truck_simulator_offroad_mod_apk.pdfIn PDF document text
    • http://feelslike35.com/heart_piece_guide_majora_s_maskez7k2.pdfIn PDF document text
    • https://cdn.sqhk.co/kukisigafumi/6Mujcie/music_player_audio_player_equalizer_bass_booster_apk.pdfIn PDF document text
    • https://govonomuvilikiw.weebly.com/uploads/1/3/4/6/134620083/6664061.pdfIn PDF document text
    • http://rcasino.info/918628497490h8m2.pdfIn PDF document text
    • https://xumagatovonag.weebly.com/uploads/1/3/5/3/135312495/af3ed680d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nabafurulevu.epizy.com/oxford_discover_3_writing_and_spelling.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_off0000dace.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDACE 5220 bytes
SHA-256: 114e3868b51a84ba25cb440dfdf68eab0e66bdca98fbd8b83f969d458e533a31
font_01_sfnt_off0000ec9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC9D 10484 bytes
SHA-256: b306a8c456877f58a061f3d60c65c9be175084bb484837f5b6dacf7a7643ad06