Malicious PDF — malware analysis report

Static analysis result for SHA-256 953970aca496516b…

MALICIOUS

PDF

109.5 KB Created: 2021-06-12 04:48:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e3da16d0586b4f8bf22c9c45e7c4c87b SHA-1: 7a6c5d97c815618d8fb22636cf2be7778c3ba439 SHA-256: 953970aca496516ba73c03f7b359dbbb3af9aabe18fe76fb90e9f7ca5665350f
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with the primary one being 'https://drafthe.ru/pbw?utm_term=rainbow+six+siege+valkyrie+elite+skin', suggesting a phishing or scam lure. The document body, though heavily obfuscated, appears to contain keywords related to the lure, and the presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://drafthe.ru/pbw?utm_term=rainbow+six+siege+valkyrie+elite+skin
    • https://sagudazotimoja.weebly.com/uploads/1/3/4/7/134753003/lifilugomasi_vozifuxenunuf_tujexusunefopa.pdf
    • https://cdn-cms.f-static.net/uploads/4530910/normal_60ba94372dff2.pdf
    • https://fokatofevi.weebly.com/uploads/1/3/2/7/132712268/9415591.pdf
    • https://sasenepekevob.weebly.com/uploads/1/3/4/2/134266747/fugawelivatuwan_werovilukom_powuf_jolodidab.pdf
    • https://static.s123-cdn-static.com/uploads/4426571/normal_5fe451d3ec182.pdf
    • https://wojipinokogax.weebly.com/uploads/1/3/4/8/134863097/misitisujalezatidala.pdf
    • https://cdn-cms.f-static.net/uploads/4378604/normal_600a9dc706ab5.pdf
    • https://xinufagepowe.weebly.com/uploads/1/3/4/4/134437511/vunun-mimidosu.pdf
    • https://cdn-cms.f-static.net/uploads/4380211/normal_60673e962db6b.pdf
    • https://static.s123-cdn-static.com/uploads/4421940/normal_5fcff6d303b45.pdf
    • https://cdn-cms.f-static.net/uploads/4459914/normal_60473e848dfcf.pdf
    • https://cdn-cms.f-static.net/uploads/4412583/normal_603f755c15ebc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://risodige.pbworks.com/f/crack_wavepad_audio_editor.pdf
    • http://niwomif.pbworks.com/f/78662297218.pdf
    • http://zixereves.pbworks.com/f/how_to_get_rlcraft_to_work.pdf
    • http://gufabewa.pbworks.com/w/file/fetch/144791511/kirchhoffs_second_law_problems_and_solutions.pdf
    • http://zosajivapesi.pbworks.com/w/file/fetch/144979623/download_3ds_max_2015_free_full_version.pdf
    • http://vowujepojez.pbworks.com/w/file/fetch/144566022/gibukesirasipujixonusini.pdf
    • http://ririgifavem.pbworks.com/w/file/fetch/145031178/romeo_and_juliet_full_movie_free_online.pdf
    • http://sawebaz.pbworks.com/f/geometry_dash_technical_texture_pack.pdf
    • http://lekuzax.pbworks.com/w/file/fetch/144419187/do_blue_dye_tests_always_have_a_faint_line.pdf
    • http://wepoline.pbworks.com/f/mulivil.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016d72.bin
fa05c9476716f608562b36a60631da9a60a1f9e0f7cab80fed6ad820457e9513		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16D72 5384 bytes
font_01_sfnt_off00017ff8.bin
0357300d44ffd4e36bf63f0f1c5c9873d2a3a51fdc60f9e307f0c529f9ec5bc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17FF8 12960 bytes

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