Malicious PDF — malware analysis report

Static analysis result for SHA-256 39e15f24195add75…

MALICIOUS

PDF

72.5 KB Created: 2020-12-16 11:44:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: bdf9d270854d1cd41507309ae7c48af7 SHA-1: bf85ad39378ff30cbf390e8472efa620ddc04050 SHA-256: 39e15f24195add7576dc5a089776bca9dc117edc550a691513896a8af18b3380
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://trafffe.ru/strik?utm_term=druid+wizard+multiclass+5e PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4372399/normal_5f8f471bd710c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369152/normal_5f95a59e686df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475727/normal_5fd9ac1cbaea1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415934/normal_5faa63a0442ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371005/normal_5faf5abccb5a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372740/normal_5f9e6a4ee74ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385436/normal_5f9f084d894d2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381528/normal_5fcdc0bbb08d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407576/normal_5fb9936581b60.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422385/normal_5fcb23cf1ab12.pdfIn PDF document text
    • https://pibazafefudo.weebly.com/uploads/1/3/0/7/130776509/6435086.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368756/normal_5f9ac56c777e8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449410/normal_5fcf60b210f02.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/d64d970a-df83-47ce-b2b3-e02ccd172785/cetosis_ovina.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/anita_moorjani_dying_to_be_me_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/terraria_demon_eye_pet.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_off0000e074.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE074 5352 bytes
SHA-256: 0311c429a81c4034aea019ec10a991b874f85d49bee3401a7a64c1cde745ab30
font_01_sfnt_off0000f2b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B4 10040 bytes
SHA-256: 6d8ef7a74e55c508a8a29fad40b11dc1e04e4799f699d0c75da48ffa5e96d079

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