Malicious PDF — malware analysis report

Static analysis result for SHA-256 32b5e227e1a486f8…

MALICIOUS

PDF

72.5 KB Created: 2020-12-27 20:08:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: c74cb0e9e71215465ee10e3a0cf4f1b0 SHA-1: 9e9e5b9d7525ea0322ee0611782dae228b43596e SHA-256: 32b5e227e1a486f85db0506de57519ad322f35267d34bbbf36f5e038319bc74d
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a significant number of external links, identified as a link farm, suggesting a malicious intent to direct users to potentially harmful websites. ClamAV and ML classifiers also flagged this file as malicious, specifically as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URIs indicate a phishing or SEO manipulation attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafftec.ru/strik?utm_term=angie+adventure+badlands+dragonfly PDF link annotation
    • https://gisetokitalakak.weebly.com/uploads/1/3/4/6/134600310/4269516.pdfIn PDF document text
    • https://gonerogad.weebly.com/uploads/1/3/1/4/131438616/xodedoxojokelewoj.pdfIn PDF document text
    • https://cdn.sqhk.co/fijajiles/hChbjhU/88070108872.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388424/normal_5fdc6459adefd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486550/normal_5fdc19cb79fbe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412408/normal_5f9941ffb0962.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371025/normal_5fdc37399ac43.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1a41be2-6155-4d63-a45e-ff36db6b6c1d/bututarobobejaluruku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c13f1637-1af1-4e6a-b8fb-f09acfeab6cd/89986179298.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48d0bb1a-cfed-41b0-8229-66a22c720afb/vudopomatewamemuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c499ea4-d8fd-48c3-8a74-57557d36f75e/duwubotiregezofin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/633ad5ee-2dbe-4b29-9665-9d663844aaba/nstm_chapter_505_piping_systems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a00bb9dd-0abe-4d31-8f8f-31ccbe8d35bc/bomoporovawaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63a74dbe-3203-4301-8c72-5b584f1a7d34/duck_game_weapons.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_off0000de91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE91 5368 bytes
SHA-256: 3b4373504b6d2e9ed1f8315930155a55530931a4bb3bff101ad1a020c32a769b
font_01_sfnt_off0000f0f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F2 10560 bytes
SHA-256: 78c48c19d13d0f804c68363e4ad205e77d4f03682fbdd98ebfcd55d4492d63f0

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