Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e906f228f05021c…

MALICIOUS

PDF

75.0 KB Created: 2020-12-23 03:46:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 368741ab0e235d877bb2ccfa137a0e07 SHA-1: c7d171b0847d2dd8dc1b6a5be34d08893a8a0f71 SHA-256: 1e906f228f05021c14fbbd7075fdb088ded9d55c3ec199217fd073a2c0b1f60a
164 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating a high probability of maliciousness. The presence of a link farm with numerous external PDF links, including one to 'trafficel.ru', suggests a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, indicating it was likely generated by a tool for creating PDFs, possibly to disguise malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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.
  • 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://trafficel.ru/strik?utm_term=my+talking+tom+gameplay+download PDF link annotation
    • https://nurufumetexode.weebly.com/uploads/1/3/5/3/135323779/tipirimox.pdfIn PDF document text
    • https://vuxojamobepu.weebly.com/uploads/1/3/4/3/134333522/tepitetevebemu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415524/normal_5f973ba61581c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374519/normal_5fb8a3e47575a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc7962c778af068263f57f8/t/5fd662d9491a58544a114ec1/1607885529690/airdroid_android_on_computer_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/zubuwujoxom/beska_star_wars.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/tamil_dubbed_movies_free_hd_1080p.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d44d9e00-061c-4703-91a8-1e34ebc99788/godewixejuvipufokifese.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1976bb8467722f1d927cd/t/5fc3e7872dd96f59186626ed/1606674313063/charles_darwin_agoraphobia.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdd37863f59a2572d8ffde5/t/5fdda181c18bd5077c8e6fb0/1608360321862/best_pokemon_games_for_android_mobile.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/mlb_playoff_format_through_the_years.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/doworidog.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0c273a13a450babf34cb7/t/5fc479c26457125654cb5c47/1606711747264/judit_decapitando_a_holofernes_caravaggio.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fe11ecc0e0ba31f9ebb695a/t/5fe1c4474ce6c363911e9fb6/1608631367905/nfl_injury_report_steelers.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/baby_blue_action_bronson_piano_sheet_music.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC19 5268 bytes
SHA-256: 55ef6a93c27f22c7c70fe26000ad7391f97d60770da3f15bfd629a343daaa138
font_01_sfnt_off0000ee17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE17 2504 bytes
SHA-256: c45c161f54ed5a6a79fcf478b5a86094009979c752b3a86bcc65b1be57c83af3
font_02_sfnt_off0000f8fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8FE 10928 bytes
SHA-256: a94de1f9c80a69ce201f2a5256f4c44f9b8b99b912e28bff4688eb7144489f8c

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