Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2bf9afe0ff644ca…

MALICIOUS

PDF

66.7 KB Created: 2020-11-13 21:30:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b750d174a331485e1c38c3097d2a7c63 SHA-1: 1fcf6fa479f67eea80573c7b82758a531891688d SHA-256: a2bf9afe0ff644ca009ad246bb734f53a44954021d39b9e02b1eee58c095fdc6
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 flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://traffnew.ru/strik?utm_term=beauty+behind+the+madness+download+d PDF link annotation
    • https://junoxavod.weebly.com/uploads/1/3/1/3/131384771/mawojisebawoxonebu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366335/normal_5f8726be4216c.pdfIn PDF document text
    • https://sepikupi.weebly.com/uploads/1/3/0/7/130738949/9886217.pdfIn PDF document text
    • https://suganolorifumu.weebly.com/uploads/1/3/0/8/130814011/946e6d87acb055b.pdfIn PDF document text
    • https://wemibevufiwoseb.weebly.com/uploads/1/3/0/8/130813314/8621fff2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366022/normal_5f8718b4395c6.pdfIn PDF document text
    • https://tijujuvuxerupuz.weebly.com/uploads/1/3/4/2/134236121/femawabatiresuvut.pdfIn PDF document text
    • https://rulomegujenuguv.weebly.com/uploads/1/3/4/3/134329868/5532713.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/9c6abe81-cdab-44fe-9f1c-45bccbbeb78a/furijewobevokan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6131930-635e-4364-920b-18d0aadb99ee/36281607208.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b7fe3414-aa1c-474d-927e-7cce07d5e2f6/juvanedisabiwasavud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76de2435-b789-4ea7-968c-2a917fb3692f/craftsman_high_wheeled_trimmer_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c015740-eb3b-4ff0-a06c-157265beb181/65149899342.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_off0000bddc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDDC 5352 bytes
SHA-256: 482657e5823b3bfbc7ca8511acbf93347a3ecdd51bc54d6c184b9802fd1324f3
font_01_sfnt_off0000cffc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFFC 13820 bytes
SHA-256: 4e2de239e2488cee8adab6bfb6b2512680e5ef9c5259145f66f5a406afe02f8d

Open this report in the interactive analyzer, or submit your own file for analysis.