Malicious PDF — malware analysis report

Static analysis result for SHA-256 89d64a68247958ad…

MALICIOUS

PDF

88.7 KB Created: 2021-05-19 02:30:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0db5c683695a3c306ea6f53a5fde4bc2 SHA-1: 9f1f65353f0f9d4de14161f55e20ffe820e9dc37 SHA-256: 89d64a68247958ad37628fde7f89254c94fdc4b63748e16fda36ba71884b9e7a
134 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to disposable hosting, and a specific URL designed to trick users into downloading cracked software. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to deliver a secondary payload or phishing content. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://resalured.ru/strik?utm_term=chemdraw+free+download+full+crack
    • http://nuderoxaxik.22web.org/contest_legal_disclaimer_template.pdf
    • https://static.s123-cdn-static.com/uploads/4491451/normal_5fc9fa0b3bd58.pdf
    • https://cdn-cms.f-static.net/uploads/4465704/normal_601b1f57dd0e5.pdf
    • http://sugewute.22web.org/pumexifapaxuw.pdf
    • https://begagezegitajaj.weebly.com/uploads/1/3/1/3/131398046/b753e0aa67.pdf
    • https://motoburibekisi.weebly.com/uploads/1/3/4/6/134623685/ab64f8d75ee.pdf
    • https://static.s123-cdn-static.com/uploads/4485569/normal_5fdf2e768446c.pdf
    • http://bukabawew.22web.org/3112515959.pdf
    • https://cdn-cms.f-static.net/uploads/4459805/normal_603a5a4b0d173.pdf
    • https://xugibadibexupov.weebly.com/uploads/1/3/4/6/134684970/disuwixo.pdf
    • https://lirefabagobaxi.weebly.com/uploads/1/3/4/0/134012393/a0f74b9.pdf
    • http://makibazapeti.22web.org/f_b_service_training_manual.pdf
    • https://static.s123-cdn-static.com/uploads/4498376/normal_5ff64b7729fa4.pdf
    • http://sudesisobibimit.22web.org/fosuloru.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://zebasera.rf.gd/badepatujolobesajo.pdf
    • https://uploads.strikinglycdn.com/files/3597e5e0-8d6c-4fef-9ad1-d1e9bda6c5ab/what_can_i_use_instead_of_a_touch_screen_pen.pdf
    • http://lefarobi.rf.gd/bondi_rescue_episode_guide_season_13.pdf
    • https://uploads.strikinglycdn.com/files/fddd97d0-6540-4a38-b89f-f11a4fd42bf8/what_are_the_ranks_in_the_us_army_from_highest_to_lowest.pdf
    • https://uploads.strikinglycdn.com/files/badbb164-b736-4ea6-ab21-0e3d22518095/lebijasevirefegafudire.pdf
    • https://uploads.strikinglycdn.com/files/5b8f12f6-3c1f-4cf5-a0d2-a0d8f2298890/hitachi_c10fsh_parts.pdf
    • http://larevatisuti.rf.gd/buddhist_bible.pdf
    • http://babazemo.epizy.com/tonojedexunodebesofozise.pdf
    • http://poxelisenaxoxig.epizy.com/papetodipumelubalijo.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eff2.bin
3326a2af227da8ccf8eacb8aa51625a16277c47da3c02b9e53bbc856554cab32		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF2 12760 bytes
font_01_sfnt_off00011980.bin
6b144769b659d010d1046b4e71640155a81b1ed7864c2e4895285dd4175c7652		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11980 5144 bytes
font_02_sfnt_off00012ae3.bin
66b1ffd7b65aee305bade1d745e6621c1cb85fd7ce6ab1b6712b3676673bebfc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12AE3 11796 bytes

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