Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f8a75e1e3a3789d…

MALICIOUS

PDF

71.0 KB Created: 2020-12-28 08:06:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: d597ef1e3bdc80d161ccc390da49fc6b SHA-1: 988435acd59d6957d2ff72e09e6b49988fa765dd SHA-256: 2f8a75e1e3a3789decb9857acf36ac1c3714dbf7bcb853dd4a51c68838b33345
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, with a critical heuristic identifying it as a PDF link farm. The embedded URLs suggest an attempt to redirect users to potentially malicious or SEO-manipulated content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://traffine.ru/123?utm_term=ley+de+inercia+formula PDF link annotation
    • https://batigagonu.weebly.com/uploads/1/3/4/7/134774980/zopixoxezimagaxas.pdfIn PDF document text
    • https://wewuketis.weebly.com/uploads/1/3/5/3/135327502/2135546.pdfIn PDF document text
    • https://cdn.sqhk.co/gugapedulob/iaWvjjT/buxafosadidup.pdfIn PDF document text
    • https://cdn.sqhk.co/dalogunutixo/jejdhjh/62123321989.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448535/normal_5fe1324f9de86.pdfIn PDF document text
    • https://cdn.sqhk.co/kakumipoman/jjx9sig/assistive_touch_iphone_6_home_button.pdfIn PDF document text
    • https://cdn.sqhk.co/zurosewe/0iehi7r/mijeresidaneg.pdfIn PDF document text
    • https://bemetezebore.weebly.com/uploads/1/3/4/8/134882820/xojamenanotivul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416810/normal_5f9586f6a1aa1.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/loranoduzuja/37875182602.pdfIn PDF document text
    • https://s3.amazonaws.com/fonibinaraj/sleep_apnea_score_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/nefunupu/brothers_in_arms_gameplay_android.pdfIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/beau_pere_movie_1981.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_off0000d80b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD80B 5032 bytes
SHA-256: ad4f98101d36ff3f3b1fdfbc059a50621c25d0619a33f82e099345c0ff635622
font_01_sfnt_off0000e921.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE921 11220 bytes
SHA-256: 0ff80792d157502b313b13248cab1d2034d58ed5771bda3d6ab78724462b16eb

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