Malicious PDF — malware analysis report

Static analysis result for SHA-256 09e8edd33caa91bf…

MALICIOUS

PDF

46.0 KB Created: 2020-10-10 18:51:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: c60b29d5617728d6dfe30186a65e0ed6 SHA-1: 9d028b448cd791e1c4c7b61a44497ad128c20f75 SHA-256: 09e8edd33caa91bf6f74cd1d1959aed4837c6bd62432f5b5f223146cc0548951
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with a critical heuristic identifying it as a malicious redirector. The primary link directs to a URL associated with known malicious infrastructure, likely intended to lead users to a phishing or malware distribution site. The document body is heavily obfuscated and contains metadata indicating it was generated by wkhtmltopdf, a tool often abused for creating malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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://cctraff.ru/strik?keyword=plano+de+leitura+da+b%25C3%25ADblia+em+6+meses+pdf In PDF document text
    • https://site-1038553.mozfiles.com/files/1038553/86502970595.pdfIn PDF document text
    • https://site-1037881.mozfiles.com/files/1037881/girun.pdfIn PDF document text
    • https://site-1038955.mozfiles.com/files/1038955/65668316692.pdfIn PDF document text
    • https://site-1038492.mozfiles.com/files/1038492/mimefapune.pdfIn PDF document text
    • http://files.ahenchmanshonor.com/uploads/1/3/1/8/131856232/cc7cc30106424.pdfIn PDF document text
    • http://nudivula.victorvalleyphlebotomy.com/uploads/1/3/0/8/130873930/3134391.pdfIn PDF document text
    • http://files.miamckimmy.com/uploads/1/3/0/9/130968926/0c889.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8777/6930/files/bdo_archer_rabam_skills.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6875/1523/files/jijida.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7663/1710/files/sorupabugexakakikosasate.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/3366/9031/files/82159950848.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/8874/1282/files/queens_high_school_for_information_research_and_technology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/3835/0753/files/fikurarepakidig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/5366/5442/files/nutozat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0467/5528/3107/files/excel_macros_dummies.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/5520/4502/files/a_few_days_more_movie.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

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63D4 5420 bytes
SHA-256: 4522365a471b04dc0dab149be0b162c4ebfc2816daeed2a5b32f1572c46f1dba
font_01_sfnt_off0000761a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x761A 11640 bytes
SHA-256: c89fa56afb77786e38ba48155ce022493929739ddcbd1339a63ee75932ff9e90
font_02_sfnt_off00009a7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A7D 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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