Malicious PDF — malware analysis report

Static analysis result for SHA-256 60fe644c5f04a814…

MALICIOUS

PDF

77.0 KB Created: 2020-12-07 02:18:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 3a9f0e7da5b6bf29cb3ba23a050fd651 SHA-1: 9643975b9d1c0314ab11a82b55640cb217b307fa SHA-256: 60fe644c5f04a814d7acb9cbf7f3dd7d8acf8110dfb7ea8ab176c42221f887c0
186 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 6

  • 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.
  • 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://trafffe.ru/strik?utm_term=aula+virtual+ies+santa+eugenia PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4459029/normal_5fb3d51f4cc77.pdfIn PDF document text
    • https://togutugu.weebly.com/uploads/1/3/4/6/134617883/adffe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409604/normal_5fb98be3d9638.pdfIn PDF document text
    • https://sirawomaperuli.weebly.com/uploads/1/3/1/3/131398091/274ca.pdfIn PDF document text
    • https://digokevun.weebly.com/uploads/1/3/4/7/134747151/wetagiloxotalod-tomuwe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458833/normal_5fae2ed640282.pdfIn PDF document text
    • https://sifizebutu.weebly.com/uploads/1/3/0/8/130814914/voxatufixore-tewixodoxag-gurakubapowet-juxobuxese.pdfIn PDF document text
    • https://mujiborabasovu.weebly.com/uploads/1/3/4/5/134590634/75e19e3411a0b93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365998/normal_5fbdc7a886f4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464327/normal_5fb8c6dc98faa.pdfIn PDF document text
    • https://rugotegejobaxus.weebly.com/uploads/1/3/4/7/134734811/8491382.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/sinadi/62018795882.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_off0000ee7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7B 4904 bytes
SHA-256: 9f6064f5451764051f77894d673898e8dfc5b637632969edf4a3442cbfb44746
font_01_sfnt_off0000ff40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF40 12140 bytes
SHA-256: 62a20260acb84cdb5523c1095a2c014085e58e5b6d1c07513c72ea30be53f933

Open this report in the interactive analyzer, or submit your own file for analysis.