Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2545155b152af5e…

MALICIOUS

PDF

104.4 KB Created: 2020-11-25 11:41:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a07234f5a8185f4c89c35f0536100bbf SHA-1: 9048d8b9b500c9fb4951140c566645405a39fe82 SHA-256: d2545155b152af5e9b313bb817050800568f83a92ead6b5306e6a61a9619640a
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 0.9997

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://trafffi.ru/123?utm_term=chapter+3+summary+activity+the+constitution+answer+key PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4401691/normal_5f90f0ca754d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383327/normal_5f9a6258759e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464078/normal_5fb5cd0c35e0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413573/normal_5f9e02154e469.pdfIn PDF document text
    • https://jezaxegare.weebly.com/uploads/1/3/1/3/131380636/5461412.pdfIn PDF document text
    • https://newejata.weebly.com/uploads/1/3/3/9/133999860/watatipelubevalodoz.pdfIn PDF document text
    • https://lopinelu.weebly.com/uploads/1/3/4/3/134369173/potoxuj_jikikuxumeviwo_wiwubufamoju_nalovo.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/1b8a7bd7-6f04-40ae-82cf-a4db227a4d88/laura_fraser_nude.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05e3a4e1-109a-4403-88f4-bbd52f8b07b7/doxebisalibirize.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3bd2d67e-5d5b-4928-a702-fd10b1b92867/dragonfly_helicopter_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cec10f5a-cd5f-4f40-b77f-a353c7ca8415/amperimetro_de_gancho.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88e66507-5ced-4395-8102-286d3835bb96/24312567894.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63d5b44a-ba46-42ec-b036-0f25ab24ae03/misetanovidi.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 3

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_off00014d0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D0C 5528 bytes
SHA-256: 3cd7653a3743ccbccdc5fdb053f5fad6e0da77301bb4c24dcbfa8f2c660ac768
font_01_sfnt_off00015fd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15FD6 11244 bytes
SHA-256: 484a9d67a36fd9d9bff38ccd43262529f8fbef7659d3d0d4ee874c5adba38023
font_02_sfnt_off000185c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x185C6 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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