Malicious PDF — malware analysis report

Static analysis result for SHA-256 122e4383f83b8335…

MALICIOUS

PDF

70.4 KB Created: 2021-02-25 02:43:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 36cbc7a8b9df2d504eb0eac8a5fabb37 SHA-1: be74874e555dc533189acc1fa85e74231182817f SHA-256: 122e4383f83b833522ea9c84314f79ea9850d6b9e4467e9b231f56d1ef9a595d
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://yafferge.ru/award?keyword=how+do+you+hide+pictures+on+android+without+app In PDF document text
    • https://cdn-cms.f-static.net/uploads/4451210/normal_5fe791c656dc6.pdfIn PDF document text
    • https://cdn.sqhk.co/wukibezoso/gfIifjf/94045968486.pdfIn PDF document text
    • https://cdn.sqhk.co/nuxarufodir/9Qcjbjf/lucky_ali_songs_download_320kbps_pagalworld.pdfIn PDF document text
    • http://viwowiziboso.22web.org/compare_fractions_lesson_6._7_answer_key.pdfIn PDF document text
    • https://cdn.sqhk.co/wovenebi/MpTGjiT/texitoluliduvat.pdfIn PDF document text
    • https://cdn.sqhk.co/wukatigubo/4tDieV1/cinemark_theatre_showtimes_texarkana_tx.pdfIn PDF document text
    • https://cdn.sqhk.co/vedukosamo/hhihjai/griseofulvin_ultramicrosize_dosing.pdfIn PDF document text
    • https://cdn.sqhk.co/sewadokoka/l4RTPjh/70672306956.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fosufozixa.rf.gd/40013273688.pdfIn PDF document text
    • https://s3.amazonaws.com/zafijukopa/wojoxobevipe.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/towoxubuf.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatofubote/audio_video_joiner_for_pc.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_off0000d53a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD53A 5284 bytes
SHA-256: 9f92855a6ed84b09306d18d6bd4e35da3804d434127920d0dd4f6c719cd449f9
font_01_sfnt_off0000e73d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE73D 10428 bytes
SHA-256: 6b7c2a1b7e35a065b1fb6a3fe17c1c6a7f35d2a1f8d3442a50bf493984c863c1