Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b252a0991cff353…

MALICIOUS

PDF

73.1 KB Created: 2020-11-13 16:24:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ace57e710a5a60409d183cc4875a5415 SHA-1: 2441c09b4831f4398152f2d6760520deaaac59c3 SHA-256: 6b252a0991cff353fd89c575349210b3d9cce15b48e06b570133f4a62a05d556
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffine.ru/strik?utm_term=greeves+anglian+sale PDF link annotation
    • https://vumusubivabup.weebly.com/uploads/1/3/4/4/134491869/5821136.pdfIn PDF document text
    • https://buveziketi.weebly.com/uploads/1/3/1/3/131398526/64451afed5.pdfIn PDF document text
    • https://jifilebipik.weebly.com/uploads/1/3/4/3/134375607/wubuserimiw.pdfIn PDF document text
    • https://ledekatibawe.weebly.com/uploads/1/3/4/2/134265754/vavaw-kuridi-fufanulab.pdfIn PDF document text
    • https://boguvetasitob.weebly.com/uploads/1/3/1/3/131380850/832083.pdfIn PDF document text
    • https://nilijinaxobizag.weebly.com/uploads/1/3/4/3/134356504/burolotokawejumezisu.pdfIn PDF document text
    • https://bajusumuke.weebly.com/uploads/1/3/2/7/132741128/8096751.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://s3.amazonaws.com/tonisefoteka/wunikuzokepizis.pdfIn PDF document text
    • https://s3.amazonaws.com/benuka/65371620837.pdfIn PDF document text
    • https://s3.amazonaws.com/tulosa/brush_lettering_practice_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b0b9de0-de21-4647-9e9c-70e04f32b57e/85456400220.pdfIn PDF document text
    • https://s3.amazonaws.com/megelugik/cold_war_cartoons_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzaganog/ova_vs_ovf.pdfIn PDF document text
    • https://s3.amazonaws.com/kesumasaka/pojererem.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_off0000d4c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4C0 4544 bytes
SHA-256: e9391b0d7b22b3ec42a56c378d4e79182581c10500e92a0e88b7119538d39ad0
font_01_sfnt_off0000e434.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE434 11004 bytes
SHA-256: 05dae4357f740560eeed3c5132d4080fb5570663d3d46a6ea91cf6de6be6140b
font_02_sfnt_off000109df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109DF 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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