Malicious PDF — malware analysis report

Static analysis result for SHA-256 e35c0ee74b0621b3…

MALICIOUS

PDF

62.8 KB Created: 2020-11-13 16:12:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d25592b3d2c18ad48027f6b8c7f5ecce SHA-1: 49ff3e989b5b50fc5cb472bea61401652af62624 SHA-256: e35c0ee74b0621b354d3b1361a5b5240f9922ec2b4000d2dba4cdaa1e5fe0e09
244 Risk Score
Tags
free-cdn-ebook-manual-lure

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, and is also detected by ClamAV as Pdf.Phishing.Trojan. The document contains a large number of embedded links, many pointing to disposable hosting services, suggesting a link farm or phishing campaign. The primary redirector URL is https://gettraff.ru/aws?utm_term=amboli+ghat+information+in+marathi, which is flagged as malicious. The presence of embedded URLs and the nature of the heuristics strongly indicate a phishing or malicious redirection attack.

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
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gettraff.ru/aws?utm_term=amboli+ghat+information+in+marathi In PDF document text
    • https://nulixedupalaz.weebly.com/uploads/1/3/0/7/130739510/ba635a12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392867/normal_5f998bb1f3003.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372101/normal_5f93c08964063.pdfIn PDF document text
    • https://rewemekekebaz.weebly.com/uploads/1/3/1/4/131406535/6200229.pdfIn PDF document text
    • https://zujiteful.weebly.com/uploads/1/3/4/6/134601399/d88493004633ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485589/normal_5faabcf67bc2c.pdfIn PDF document text
    • https://lubozukutiximik.weebly.com/uploads/1/3/4/4/134472848/nitotevidet.pdfIn PDF document text
    • https://sedifuwenute.weebly.com/uploads/1/3/4/4/134464273/tobunobakuzav-pawatoj-ratovabixa-womoduwowarufuf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392664/normal_5f9369b1199c3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365660/normal_5fac2972d47e1.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/lipekipuvenuji/65611071144.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/430d675a-5216-4e98-b192-a1343cfefa01/christmas_quiz_questions_and_answers_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40a4461d-ad90-4df5-880d-27c651f0b333/72801094011.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85c185e4-322c-4a72-b824-dc70996e144d/dupog.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/xiwiluwevoki.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_off0000ba57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA57 5132 bytes
SHA-256: fc191b7ba3202904da343c189d17bf2f45d3fbb44cacb909132bcb2a583b233a
font_01_sfnt_off0000cba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBA7 10268 bytes
SHA-256: 7e3d2fcfcd64558164bbf70133c9756f7e25554a252a0c61c4e3f2a24a834b14

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