Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dc453b7c12bfbc3…

MALICIOUS

PDF

74.8 KB Created: 2020-12-13 14:24:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: cdf368ab6b4bc0876b170bf6916f694f SHA-1: b84b5152a001e07ccf3ab81cf15ea1bf0a14ba0c SHA-256: 0dc453b7c12bfbc3f7dbca50c4f5af9d7e03a244f2c43fbcde5e952c4aa79502
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, many of which are part of a link farm, and one prominent link disguised as a development guide. This URL, 'https://traffnew.ru/aws?utm_term=eclipse+plugin+development+guide', is highly suspicious and likely leads to a phishing or malware distribution site. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery.

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://traffnew.ru/aws?utm_term=eclipse+plugin+development+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4475987/normal_5faa47a399447.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366642/normal_5f8bb83042e46.pdfIn PDF document text
    • https://kipunokazapalu.weebly.com/uploads/1/3/4/7/134774983/310d2119dc9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448124/normal_5fc53ea81e36b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402488/normal_5fc4a8ee7df60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426832/normal_5fc353f98fd2d.pdfIn PDF document text
    • https://gurigibafex.weebly.com/uploads/1/3/0/7/130739571/ae962212edf4302.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453098/normal_5fad2168332e6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367283/normal_5fc3d5759b936.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe75e0fa04221c71f3d79f/1606317537787/properties_of_waves_worksheet_answers_pearson_education.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce6fa92088997336171c3a/t/5fd1a36b7cf94534dc57fd18/1607574380584/save_planet_earth_vans.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/formal_graduation_invitation_letter_sample.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e426.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE426 5104 bytes
SHA-256: 4740e5a369446bc4190f6cd24457525bed599e2fcee00930ccf799d81345a04b
font_01_sfnt_off0000f586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF586 11996 bytes
SHA-256: 12d76c2b89e4fd34274d20a582ee835f9faafcae39a35d84ec9cdf962fbea118

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