Malicious PDF — malware analysis report

Static analysis result for SHA-256 30b784d4801d99d3…

MALICIOUS

PDF

76.3 KB Created: 2021-02-13 10:20:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a62d073f95683fe0c02f8d16a91baa17 SHA-1: a5eae6445c14dd4f3ce1f25894d0b5f42ee6dc5e SHA-256: 30b784d4801d99d325594a3c97046ff1fccc6ec5e0cab8e61a0a1a27dffea011
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to domains associated with link farms or potentially malicious content, as indicated by the 'PDF_SEO_LINK_FARM' heuristic. The ClamAV detection and ML classifier also strongly suggest malicious intent. While no scripts were directly extracted, the presence of embedded URIs and the overall structure point towards a phishing or malware distribution scheme, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://seumenha.ru/aws?utm_term=kindle+android+read+aloud PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4366311/normal_5ff6563cdd3f8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420250/normal_5fcda8f90a23d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382413/normal_6002574320b6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459059/normal_5fd6d5c8a7fc3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471513/normal_5fda62a48c6a2.pdfIn PDF document text
    • https://pikisavejalanab.weebly.com/uploads/1/3/3/9/133986241/17747b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443801/normal_5fca7485ad43f.pdfIn PDF document text
    • https://binikefesomeb.weebly.com/uploads/1/3/5/3/135386190/adad0b678.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371497/normal_600a1f0075d5d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4527237/normal_60059f79c444b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497658/normal_5ff9a54e0e2bb.pdfIn PDF document text
    • https://widegavadiwudux.weebly.com/uploads/1/3/5/3/135325068/xofujo.pdfIn PDF document text
    • https://jimigafekalese.weebly.com/uploads/1/3/1/4/131407537/jewofew-pedijijotes-rabitezija.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371495/normal_60240ba0df9df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475397/normal_600eab2c9542b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501042/normal_5ff1b64b43362.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481286/normal_5fcae87330dee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425227/normal_5ff2149cec915.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://koxevopigi.epizy.com/realidades_capitulo_1b_answers_page_24.pdfIn PDF document text
    • http://fusifovizit.rf.gd/water_under_the_bridge_original_song.pdfIn PDF document text
    • http://rufizugo.epizy.com/computer_terminology_crossword_puzzle_answers.pdfIn PDF document text
    • http://jufulejilola.epizy.com/salesforce_administrator_maintenance_exam_summer_19_answers.pdfIn PDF document text
    • http://rozofamano.epizy.com/34681046454.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_off0000ef00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF00 4612 bytes
SHA-256: 91a8d555e676861333a12e0687bd6dd8c288a49721f5a3ea8b9cdba348c0ef22
font_01_sfnt_off0000feb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB9 10872 bytes
SHA-256: 4bcc2e32aa50dbd0311bacba7f89581ea14c0c5e7cd152cb380c3d915717ceae

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