Malicious PDF — malware analysis report

Static analysis result for SHA-256 70e1c29a562f13c3…

MALICIOUS

PDF

69.1 KB Created: 2020-11-24 17:44:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: aa17c17a71589112dfe64a4b23b968d1 SHA-1: e404acb70180dd53e89da0743d9805c8530ba612 SHA-256: 70e1c29a562f13c3b2035a9c673c1db9e4cef1fa58ca7933ced4a39c1fe994ce
214 Risk Score

Malware Insights

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

The PDF file contains multiple heuristics indicating malicious intent, including a critical alert for a malicious redirector link and a PDF link farm. The ML classifier also strongly flagged this PDF as malicious. The embedded URLs suggest an attempt to lure users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/strik?utm_term=los+generales+de+dios+1 In PDF document text
    • https://lagukekejase.weebly.com/uploads/1/3/0/8/130815031/6873595.pdfIn PDF document text
    • https://gozofuma.weebly.com/uploads/1/3/0/8/130874065/7162611.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/fosagoba/lulobikiguto.pdfIn PDF document text
    • https://s3.amazonaws.com/sesafefanulokam/42970371265.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/organic_molecules_worksheet_review_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/wheel_of_fortune_game_no.pdfIn PDF document text
    • https://s3.amazonaws.com/lurutopobi/chemistry_review_crossword_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/regegozumekoza/picture_collage_maker_pro_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzufexarevima/lego_star_wars_tfa_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/gdevelop_free_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/arctic_cat_atv_300_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/intermediate_accounting_6th_edition_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/gotenukevepunin/h2o2_h2o_o2_oxidation_number.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE81 4984 bytes
SHA-256: cb3d9418bc954b0b09098ebca297c48b6ee57ad034f5228af8b25bf6ee486734
font_01_sfnt_off0000df85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF85 11808 bytes
SHA-256: c810a5c3bdeacfa8da158c3166f831f911bc211e85159f43ee248be7f57242cc

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