Malicious PDF — malware analysis report

Static analysis result for SHA-256 16035bd8302306fd…

MALICIOUS

PDF

76.6 KB Created: 2021-04-29 05:53:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: ddf6d262c2247dc89102e455f9c8b318 SHA-1: 77ab0cb9bd951e88ad280d18f6b7ca0b25092d8c SHA-256: 16035bd8302306fd6c5d029faef8e762910e22890d370b67ee426218c731a10a
156 Risk Score

Malware Insights

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

This PDF file contains numerous external links, a common tactic for phishing and SEO spam. The primary external URI, 'https://fokemale.ru/strik?utm_term=how+to+see+serial+number+of+lenovo+laptop', suggests a lure to a website disguised as a search result. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fokemale.ru/strik?utm_term=how+to+see+serial+number+of+lenovo+laptop PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426820/normal_606cba6ed15d4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368237/normal_5ff7a2d9f38ef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xijilesuzuxo/65887753020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6ce243c-b79b-4a11-b73c-ae20e1967b0d/jutifafume.pdfIn PDF document text
    • https://s3.amazonaws.com/feborobegibew/c._o._d_mobile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b4676ee-bce9-4a93-b11a-ed419826ac9a/sword_art_online_alicization_war_of_underworld_season_2_episode_16.pdfIn PDF document text
    • https://d7504aae-3d37-493f-8789-a5629a6fcc30.filesusr.com/ugd/7ca9f5_0fc6f9c808ae4e958d319a2a008d683b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xupimaral/is_cyberlink_powerdirector_safe.pdfIn PDF document text
    • https://76dff9f2-92bf-4494-b352-22ec070493ce.filesusr.com/ugd/6166c9_333f7cfc6f06446f9825d0d58154295a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xoxaneral/32970152114.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/140f22cb-1d1f-4765-9339-ef25e41adb8c/wejowa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a454239c-4a73-4fc0-96e4-32f0652add32/garobujigasuxobopomo.pdfIn PDF document text
    • https://s3.amazonaws.com/xewamejixolefaj/what_is_retributive_theory_of_punishment.pdfIn PDF document text
    • https://0491f86b-060d-4f4a-be23-b0d01488777f.filesusr.com/ugd/faa7ef_cea6ff89ac564d55be65622a283fc710.pdf?index=trueIn PDF document text
    • https://8a833fea-7c9a-4d2e-a5a7-d3590f42a3e5.filesusr.com/ugd/9aab09_836a028c629848a496b2baadd6ff950a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/datarofapakil/zibejirelokasadexosux.pdfIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/dd_book_maker.pdfIn PDF document text
    • https://s3.amazonaws.com/lakadutof/venomenezufawi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4b973bd-ce40-4ef1-96b2-d04fae3107e6/how_to_reset_time_on_armitron_wr165_watch.pdfIn PDF document text
    • https://b2691e05-be35-46d2-a26d-08c503de0475.filesusr.com/ugd/b15c0b_76ece3a2b4ea4e329e501dfc4af85ec4.pdf?index=trueIn PDF document text
    • https://c6f55193-7475-4343-97dd-33cb3b141b6a.filesusr.com/ugd/808d8c_a3bcc571ca834204a3b22c091ba72ccf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/buwosevax/tabela_fipe_de_carros_usados_ford_ka.pdfIn PDF document text
    • https://ed59cdd8-0d75-4634-8bb2-7afdb9da103e.filesusr.com/ugd/9cb112_4536516272144fb89e1f797b58638c6e.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFB 5300 bytes
SHA-256: 774c5ef05478e8fb216d32c0fc86f9b623af549bd13a608471ec81326d3dcb15
font_01_sfnt_off0000fe00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE00 11408 bytes
SHA-256: e057c0f3a05babd18735e67afbc992ff363e1bc94c828aba44550e5cd21ffbdc

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