Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5d9a84122743ece…

MALICIOUS

PDF

79.5 KB Created: 2021-02-10 17:01:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: b513c6c31244c48c8474eb9dc8b87623 SHA-1: 1bec09f6a604bcb11ca860f5106eb2543dae0d05 SHA-256: c5d9a84122743eced4eea92e9e03e35c8f63a3dc49b8745bb9ec9475f23646f5
126 Risk Score

Malware Insights

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

The file was detected as malicious by multiple engines, including ClamAV and an ML classifier. It contains numerous embedded URLs pointing to disposable hosting and link farms, a common tactic for distributing malware or phishing content. The PDF structure and embedded links suggest an attempt to redirect users to malicious sites, likely as part of a broader phishing or malware distribution campaign.

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://jottigo.ru/wb?keyword=android%20constraint%20layout%20guideline%20example PDF link annotation
    • https://vazaratel.weebly.com/uploads/1/3/4/0/134017227/4577d42e281.pdfIn PDF document text
    • http://gta-msk.ru/uk_board_games_expo_20202gpou.pdfIn PDF document text
    • http://vrestoran.info/wupumidasosor0ge.pdfIn PDF document text
    • https://cdn.sqhk.co/koditisalupe/ighbLpR/tangled_up_in_blue_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/waxolulum/egeUgip/vr_360_horror_movies.pdfIn PDF document text
    • http://idealicait.website/bosiruredenijadagomvgd50.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409403/normal_5fd6627dd040f.pdfIn PDF document text
    • http://topsale.pro/jilodadutuliguzosidiiqnm.pdfIn PDF document text
    • https://tozadifoxu.weebly.com/uploads/1/3/4/9/134904498/zuduku.pdfIn PDF document text
    • http://you-bestshop.xyz/ringer_solution_compositiongcxoj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443598/normal_5fccea301ce30.pdfIn PDF document text
    • http://mifuvaxikibowi.22web.org/call_voice_changing_app_free.pdfIn PDF document text
    • http://centerverifybadge.com/download_drake_pop_style_mp3ehhaj.pdfIn PDF document text
    • https://joxejiduzimomad.weebly.com/uploads/1/3/1/3/131383973/76ce5dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416666/normal_600f298161659.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474719/normal_5fee67bcef2d4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ripotuteruposa.rf.gd/daily_guided_meditation_free.pdfIn PDF document text
    • http://sonasekofuxix.rf.gd/74866246714.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
    • 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_off0000e1de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1DE 5552 bytes
SHA-256: 3d610b28c41dac2e4de3a79d857872eb0d9aaab56958278027b4716fe621c2a9
font_01_sfnt_off0000f4ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4BA 11288 bytes
SHA-256: c310d72947a7921f3aad4a79e4914a44ccbcbabad9b38e07ef0bf16e1cabd9e4
font_02_sfnt_off00011b43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B43 16088 bytes
SHA-256: 62b3948e0e40d8ba1e83d9aa19c7af70085e7b6691727982ba447b75cbddb3f9

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