Malicious PDF — malware analysis report

Static analysis result for SHA-256 a80ad94650a8b841…

MALICIOUS

PDF

74.3 KB Created: 2020-11-19 02:06:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: bc56b6ee17123af1972a3fbf5be38f15 SHA-1: df447384cdf0051f00fc7b22365d981a23faadbf SHA-256: a80ad94650a8b84127dabb2b1b552195ce1bf0e7e0672bc10219610e3450bc40
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-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://traffine.ru/123?utm_term=poblacion+de+honduras+ine PDF link annotation
    • https://nujawarasut.weebly.com/uploads/1/3/4/3/134310583/9656511.pdfIn PDF document text
    • https://tafopolen.weebly.com/uploads/1/3/4/3/134396822/c6c3236e7942fcf.pdfIn PDF document text
    • https://rinedasufuketon.weebly.com/uploads/1/3/4/3/134340565/177336.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377928/normal_5f93d5b2060aa.pdfIn PDF document text
    • https://kokexofagisukop.weebly.com/uploads/1/3/2/7/132710589/bovajilamivakota.pdfIn PDF document text
    • https://febukorev.weebly.com/uploads/1/3/4/3/134325382/7724482.pdfIn PDF document text
    • https://moleresudiba.weebly.com/uploads/1/3/4/4/134447347/5965738.pdfIn PDF document text
    • https://vobudofokivelux.weebly.com/uploads/1/3/4/5/134599261/d712d4d.pdfIn PDF document text
    • https://gutomaxitokivi.weebly.com/uploads/1/3/1/3/131383747/viwosominoz.pdfIn PDF document text
    • https://lonunibulitog.weebly.com/uploads/1/3/4/4/134498578/b50cdfd004f8.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/wonoti/51657621369.pdfIn PDF document text
    • https://s3.amazonaws.com/genukopapovixo/desuxid.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/battery_calibration_apk4free.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/arithmetic_sequence_practice_worksheet_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/fundamentals_of_communication_engineering.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_off0000e314.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE314 5168 bytes
SHA-256: d7ff0a434b5e9b3480fca9ff361782c95ddbc26046746f43269dd0367eb26d8b
font_01_sfnt_off0000f491.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF491 11624 bytes
SHA-256: 7102b8966d4a5828a96bbec0445bb9cd99010249fef4670958560b6b8d14c7d3

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