Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a8dae97528cbc52…

MALICIOUS

PDF

132.9 KB Created: 2021-05-14 22:00:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7b4721a59fb7e5cb08cccd2039955cf1 SHA-1: e5c4b3d0f5ad8d4ea423e4625335389d84e9bd18 SHA-256: 2a8dae97528cbc52a5c75138d68e35e8c06b7fba1ba53873289bf81c4c75bb4f
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a phishing or trojan payload. The document contains a large number of external links, suggesting a link farm or SEO manipulation tactic to direct users to potentially malicious sites. The embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest the primary goal is to redirect users to external content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://mezovuduw.ru/strik?utm_term=resumen+de+la+obra+romeo+y+julieta+pdf
    • https://cdn.sqhk.co/wumidimux/jiicjbf/harris_snodgrass_jacksonville_fl.pdf
    • https://cdn.sqhk.co/gutinisiv/Wjfib0Q/nonozazedowefinozen.pdf
    • https://cdn.sqhk.co/fosojatesog/Mgie5if/mission_igi_free_shooting_games_fps_apk_download.pdf
    • https://cdn-cms.f-static.net/uploads/4366632/normal_600ade757a3a0.pdf
    • http://nefritthebestthing.site/vusikabovufurobogifanabiki1du.pdf
    • https://cdn-cms.f-static.net/uploads/4471985/normal_6048eb1ec6ab6.pdf
    • https://cdn.sqhk.co/fowipovoji/jcfib8x/easy_sour_cream_lemon_pound_cake_recipe.pdf
    • http://tovelksa.website/sijimezazmz0bz.pdf
    • https://cdn.sqhk.co/bofagenined/cgdBrJE/dimurarivanuridonoduvop.pdf
    • https://cdn.sqhk.co/sisagoku/jfQjgNr/spinosaurus_size_jurassic_park.pdf
    • https://fojowixejomad.weebly.com/uploads/1/3/2/6/132681658/37e56d90374872.pdf
    • https://cdn.sqhk.co/tesadubozino/dbiUNnu/wubekobe.pdf
    • https://cdn-cms.f-static.net/uploads/4419206/normal_6063725f3b10c.pdf
    • https://cdn-cms.f-static.net/uploads/4371267/normal_60498a5a6dab2.pdf
    • https://cdn.sqhk.co/jumifokujuje/jjijngh/23691070924.pdf
    • https://cdn.sqhk.co/zoxowowi/nThaKif/madman_after_doomsday_mod_apk_unlimited_money.pdf
    • https://cdn-cms.f-static.net/uploads/4422637/normal_6010d357765b1.pdf
    • https://kamefumude.weebly.com/uploads/1/3/4/0/134018396/7547ad38b68ba29.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://e0a971b2-7104-4718-9e5f-4f17d768618f.filesusr.com/ugd/6d43b6_abb29012d3fe4945ac47f3a9cfa0e27b.pdf?index=true
    • https://76df98a8-3e94-4eee-a6f5-23e1de06049b.filesusr.com/ugd/54c74c_7aeca74655ec4c15bb88234295dbf6c1.pdf?index=true
    • https://0e01c86c-6ad9-43de-bc04-b8819f410213.filesusr.com/ugd/73c254_aa3791b7eefa42afacbe1285a472f07e.pdf?index=true
    • https://18574fdc-dbe8-4f24-a3f7-ab3d6ff540e7.filesusr.com/ugd/d45bfa_60ab3e0ea547405abbc8a34ea4c04399.pdf?index=true
    • https://68f2566a-c586-4d15-a5d1-3a72044c38f3.filesusr.com/ugd/ecec20_2cd2f0ede23f4dbca7475ae830a0fc91.pdf?index=true
    • 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_off0001ccb2.bin
0cef49a61c09066d119d5f5523a668c0c5a8781f4227869be47d955579162c26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1CCB2 5512 bytes
font_01_sfnt_off0001df60.bin
94f6f5bb71cfbcaa4b270dfacaeebdfd33f17ec46fa9153b45c5a29ccd5d309f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1DF60 11896 bytes

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