Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4a367338b5bda66…

MALICIOUS

PDF

74.5 KB Created: 2020-11-13 03:39:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 92038dc8b9a1d90a68c74475d38c5091 SHA-1: 97aa9533b03c399e26c9ed0945e73f8da48b7c1e SHA-256: b4a367338b5bda66de794cb4edb1902881781b45c71a12dd8f9d1b9bfd79052c
214 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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/strik?utm_term=magic+the+gathering+deck+build+guide In PDF document text
    • https://posalezonekat.weebly.com/uploads/1/3/4/6/134628665/7089090.pdfIn PDF document text
    • https://motanaweda.weebly.com/uploads/1/3/4/3/134316912/xiluvorafufuj.pdfIn PDF document text
    • https://bilewazivabo.weebly.com/uploads/1/3/2/8/132816117/338325.pdfIn PDF document text
    • https://kalabuzamebuku.weebly.com/uploads/1/3/4/3/134339718/rogoko.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/311e0706-3839-479c-b4a6-dd6e9e39b857/5342466594.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/talideterusep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14259538-7cca-4f1f-bfd5-4870a847b0e3/zewimiliwizifaroj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e109562f-f56a-4be3-8da8-26b15d27dae5/36511018817.pdfIn PDF document text
    • https://s3.amazonaws.com/watajive/58456796592.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00b466d9-7c71-4ca9-89c3-dd981a340fa3/qyt_kt-8900d_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/sawefogenodufomoge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73ca6916-baa1-4d93-93b6-18f06e61128d/ffxiv_switch_instance.pdfIn PDF document text
    • https://s3.amazonaws.com/juzalizuvar/durosofot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c09a61a4-f288-49b0-96b0-ad3d10aaef93/virarukabuguz.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD263 5004 bytes
SHA-256: 2f2c6d61ac7ce042828921d00db0ed16ef35494d75a284fbb71209e641ae6ced
font_01_sfnt_off0000e34e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE34E 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_02_sfnt_off0000ebdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBDB 10148 bytes
SHA-256: 1689e05a77699686bd6c78dc2693e3d9682b6972295e3aacd0afa3b4ec5367a5
font_03_sfnt_off00010ea8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA8 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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