Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fa5ec965ba03046…

MALICIOUS

PDF

65.8 KB Created: 2020-12-15 09:40:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 5b7730b0195d340a14ad4b616d8e680e SHA-1: d2064dd5e3b0c17e4f0022ce74bcf79bf06846c8 SHA-256: 2fa5ec965ba03046f6001f8b90023a41ab649b5629fb4412643bc600d6761834
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains metadata related to PDF generation, but no direct scripting was extracted.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://trafffe.ru/123?utm_term=newton%2527s+2nd+law+of+motion+worksheet PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4418747/normal_5fcf826fd939e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465006/normal_5fb78509f2a00.pdfIn PDF document text
    • https://dodesagetulisuv.weebly.com/uploads/1/3/4/9/134902864/gotabobabe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366978/normal_5fc1766149c7e.pdfIn PDF document text
    • https://viweposedijul.weebly.com/uploads/1/3/1/0/131070314/76560270a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453563/normal_5fa4d81fb9079.pdfIn PDF document text
    • https://bafizotadax.weebly.com/uploads/1/3/4/7/134761596/velibiv-gewasu-moruzujigeva.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408004/normal_5f92c70a698ee.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fce6125e68b41342badf470/t/5fd66cb1e5ac58289623be1d/1607888050199/close_twitter_account_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b0dad70-8a63-4d1c-b186-5e1bd1ca283e/dirivixubazedese.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e21fbfe-09a1-43e2-b5e7-31b3e96909f9/kakikuradovatu.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/netgear_ms510tx_manual.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bcce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCCE 1964 bytes
SHA-256: cafc66053d53eb8e3277a25bdee2e7701b17d43b20e552da9cba7d884a1a5f39
font_01_sfnt_off0000c61c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC61C 5440 bytes
SHA-256: 4248d8528a3e20fea31ae4e717f2d5af8f786cbcdc753037e2d6af9f63d3bf02
font_02_sfnt_off0000d891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD891 9904 bytes
SHA-256: d0d9c389272f42e4e32225616cc1866dc5af79dd45d6c7f8eda2a9ccc1e5f58f

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