Malicious PDF — malware analysis report

Static analysis result for SHA-256 c06df9cae75b9d62…

MALICIOUS

PDF

65.6 KB Created: 2020-12-24 20:27:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 8806db04586cf79c2bf555f0f3e6afd6 SHA-1: bfd2fee9e576d22bf6f0c98343325c198a94b0ce SHA-256: c06df9cae75b9d6217479aedc7f48080b4b12f1d9594bc14fe7d9ecc164f9168
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious and likely phishing-related. It contains numerous external links, with a critical heuristic identifying a 'PDF_SEO_LINK_FARM' suggesting a large number of outbound links designed to manipulate search results or distribute content. The primary IOC is a URL that appears to be part of a link farm, potentially leading to a phishing page or malware.

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://trafffi.ru/123?utm_term=kenmore+elite+he3+dryer+f01+error PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4459326/normal_5fd155dc88a91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421217/normal_5fd3aefd4350e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373304/normal_5f89fc249b25f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416128/normal_5f9a242576871.pdfIn PDF document text
    • https://wuvirinofibugiz.weebly.com/uploads/1/3/1/0/131070402/fuziwakirub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421970/normal_5faf94124dcee.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/a7da59dd-2c27-4732-8375-adcb27912f61/47744961672.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b33cebf-a70d-4304-a578-eb0cb3a9c46d/lepasamesomidovoguf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/baefed9b-a422-4364-800a-98739aad840b/talking_flowers_maldon_phone_number.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70a98c1c-c121-4adf-8b84-d91880d3f3cb/42495299270.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/nulolokoxilujazepav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33360c50-8602-464d-859d-bf956509a367/87641691050.pdfIn PDF document text
    • https://s3.amazonaws.com/bejexe/asco_breast_cancer_prevention_guidelines.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_off0000c2a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2A7 5188 bytes
SHA-256: 0069c4dfe229ac323707ebd179e1400a17b5afa48c369f09aecf91115a221098
font_01_sfnt_off0000d43c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD43C 10968 bytes
SHA-256: 0c8f9d20bdbe213d4ac629d30d4b06956c2aec1a4315165c9c25c68907f24be8

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