Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4e461291480a411…

MALICIOUS

PDF

90.7 KB Created: 2020-12-11 04:12:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 829f59b239f9e54c2f6ba9f84ecfeaa5 SHA-1: 73b4f1f06413c94e69edb68d7e106f8eab7fc4af SHA-256: a4e461291480a4119977d8f5116dae145d7ed8d13d2e3bc2ae9388bb32a5a95d
214 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, specifically flagging it as a redirector link and a link farm. The embedded content, though heavily obfuscated, suggests a lure related to a "vanilla wow holy priest leveling guide" to entice users to click on numerous external links. One of these links, `https://traffmen.ru/wb?keyword=vanilla%20wow%20holy%20priest%20leveling%20guide`, points to known malicious redirector infrastructure, indicating a phishing or scam attempt.

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/wb?keyword=vanilla%20wow%20holy%20priest%20leveling%20guide In PDF document text
    • https://cdn-cms.f-static.net/uploads/4385848/normal_5fa5521997e71.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367305/normal_5f8752a9a81b6.pdfIn PDF document text
    • https://tudupumodowi.weebly.com/uploads/1/3/1/4/131406798/4281276.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366311/normal_5f92346290c3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365613/normal_5f87174424a10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369916/normal_5fa4d864e7197.pdfIn PDF document text
    • https://wesotapaxo.weebly.com/uploads/1/3/4/4/134488604/3147131.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369928/normal_5fbd042dcf8ec.pdfIn PDF document text
    • https://sapilijufidukuw.weebly.com/uploads/1/3/4/9/134901451/7346127.pdfIn PDF document text
    • https://zazalefofano.weebly.com/uploads/1/3/4/5/134578352/bolemisivi.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/fazujo/bein_sports_connect_app.pdfIn PDF document text
    • https://s3.amazonaws.com/jepavilutabilel/vowowixurevupafejonasim.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/storybook_calligraphy_script_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc19c025e8e827d4292db12/t/5fc5cbe818e72e5fdba07029/1606798316549/ro_dbt_skills_manual.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d3b00b6b03258f353712/t/5fc3937b3485235c86350769/1606652796702/lee_county_va_public_schools_jobs.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/charles_darwin_book_origin_of_species.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_off000123d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123D9 5440 bytes
SHA-256: 0772bf31bb4f119f58b4f57a67d5fdddaa3326d5f9836ddad4121752b6b90805
font_01_sfnt_off00013676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13676 11508 bytes
SHA-256: c680f8ac3356193b2611a8a6ef9cf18c24558bee7ea69bbcaa91e0c0300e5c34

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