Malicious PDF — malware analysis report

Static analysis result for SHA-256 05a10c6785c7dd66…

MALICIOUS

PDF

71.3 KB Created: 2020-12-06 17:42:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 988fd930f15be8d5a29e093c1a246ba9 SHA-1: da2a253b6a1057a01425d59156572955e58338ad SHA-256: 05a10c6785c7dd666145b6ad7dd3bcc21c1d884d24949c48d5c70d1b0d02ce80
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://traffking.ru/strik?utm_term=the+wisdom+of+sundays+book+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4412173/normal_5f956eb0726c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460706/normal_5fa33bf65ba52.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403679/normal_5f996bc345bd6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391623/normal_5f96652696670.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391015/normal_5fa902be9b6e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376096/normal_5fa3e00a63b82.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379241/normal_5fa35ea512eef.pdfIn PDF document text
    • https://vebupanulaxufe.weebly.com/uploads/1/3/4/3/134393715/5928a011bd0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497082/normal_5fb5970484e84.pdfIn PDF document text
    • https://pezosoxebigaxox.weebly.com/uploads/1/3/4/3/134337327/3009425.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388289/normal_5f8fa8f81a74f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xetasif/driving_schools_in_battle_ground_washington.pdfIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/gutuwufivuzibusipedelu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06ea8f9e-f6a7-4e01-ad60-fb33fca12a88/75684749961.pdfIn PDF document text
    • https://s3.amazonaws.com/tobobowu/notabematunidufivefage.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA22 5500 bytes
SHA-256: 10b8de53b78e0c81327159099276aa72f143055ef74007dcf1f786414adc1de5
font_01_sfnt_off0000ecc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC7 10512 bytes
SHA-256: 4ed118f9281151641c42c8bb68be34c0224cc44a63518a984c1b84c9cbeac9f5

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