Malicious PDF — malware analysis report

Static analysis result for SHA-256 1377ed4f8fbe6d12…

MALICIOUS

PDF

64.0 KB Created: 2020-11-26 20:57:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ace87949912a24b307a2529c02840ac8 SHA-1: 9c1207910a242765fe61d003f66ab753614e9608 SHA-256: 1377ed4f8fbe6d12598268a4bf1f1a24f502588a662ac095b4d8902ebe6b1f46
156 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 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://traffking.ru/strik?utm_term=irwin+door+lock+installation+kit+instructions PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417999/normal_5f9df6091f25c.pdfIn PDF document text
    • https://joleziravakejar.weebly.com/uploads/1/3/4/4/134460301/50e0b91ff37.pdfIn PDF document text
    • https://gemiwanot.weebly.com/uploads/1/3/4/4/134495393/8471828.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365620/normal_5f88d13e52518.pdfIn PDF document text
    • https://junoxavod.weebly.com/uploads/1/3/1/3/131384771/8762215.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381756/normal_5f8b46538a74c.pdfIn PDF document text
    • https://vamibigomez.weebly.com/uploads/1/3/4/4/134438308/wovajanisex-mudoj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/4ad3061f-da97-440d-9e3f-64fa10a3735d/puvivajiruvam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d2534b8-0f81-4a2f-96cd-8863f9467d0d/74422870465.pdfIn PDF document text
    • https://s3.amazonaws.com/wefemabeni/sigavikuboxazotatuxewodaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ddcdbc3-f59a-40c9-8fe7-0c4f308c470c/my_cafe_recipes_and_stories_hack_ios.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4c1bf0a-c94a-46b1-b020-53cd8b566570/92976624280.pdfIn PDF document text
    • https://s3.amazonaws.com/vinejivunitego/garubetajilikuxa.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB354 4792 bytes
SHA-256: 531d210ec7e8f901a3fd72b75d3d0bdea722b8b1028b1c9194ec1712ded7f19c
font_01_sfnt_off0000c3a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3A7 9684 bytes
SHA-256: 81ed3ae75f02439e1915b4e6305d9683888804860d11237998954c8aed7cc301
font_02_sfnt_off0000e4bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4BD 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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