Malicious PDF — malware analysis report

Static analysis result for SHA-256 c80956f0d8fd32e7…

MALICIOUS

PDF

78.5 KB Created: 2021-04-07 03:11:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 534f1e9e4e91e096719ffb41e93f8de9 SHA-1: 0acbbbe50537981dc7de103b8383fe0dd159473e SHA-256: c80956f0d8fd32e7a9644440b2bae77385b82e37c0166700bb066b3cf2fc4316
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 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.
  • 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://midufefew.ru/123?utm_term=indoor+grills+consumer+reports PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4446168/normal_600633cc97864.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371240/normal_5ff7f6f197c29.pdfIn PDF document text
    • https://cdn.sqhk.co/ruvonusebex/cgjgfih/werewolf_mask_kids.pdfIn PDF document text
    • https://nonemofolovexuv.weebly.com/uploads/1/3/0/8/130874593/1841509.pdfIn PDF document text
    • https://cdn.sqhk.co/lojegalivo/vKSLOge/jufuxa.pdfIn PDF document text
    • https://mepagalupotope.weebly.com/uploads/1/3/4/2/134265457/fulumemog.pdfIn PDF document text
    • http://raisinshub.club/ncert_maths_exercise_2.2_class_9hxpo0.pdfIn PDF document text
    • https://paleforekirito.weebly.com/uploads/1/3/4/5/134579508/2529641.pdfIn PDF document text
    • https://cdn.sqhk.co/bexefoboxevi/jlTxjhm/music_notes_do_re_mi_fa_sol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418379/normal_605d3bf546d3c.pdfIn PDF document text
    • http://hushseo.online/la_crosse_atomic_wall_clock_with_weather_forecastsjfh8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/davawina/outback_aricanduva_formas_de_pagamento.pdfIn PDF document text
    • https://s3.amazonaws.com/pafexegud/69671346780.pdfIn PDF document text
    • https://s3.amazonaws.com/vigevot/zubigerubavubaxe.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/anari_movie_song.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/18660388423.pdfIn PDF document text
    • https://s3.amazonaws.com/fejenijovekozu/piviniloxuzavozorutukow.pdfIn PDF document text
    • https://s3.amazonaws.com/baxegezivumi/kuvamemo.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatofubote/20349983737.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e848.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE848 5000 bytes
SHA-256: e612a2d008ab8c5fd24840ee11fcda93ff67192af384401253f97125b0cff9d0
font_01_sfnt_off0000f931.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF931 10832 bytes
SHA-256: 82c7dde8ed4b878d2cd8cb5d6b816bbcc11dced5af686a1065f5a1eec59b3860
font_02_sfnt_off00011e48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E48 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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