Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b68cd908d65edb7…

MALICIOUS

PDF

60.8 KB Created: 2020-12-14 23:12:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 846fd937b5edf0046e503350bec6e0d8 SHA-1: 1007e1a43f670e369aea9ffd0874304f2db7f99a SHA-256: 9b68cd908d65edb7fb42b79054cc08537951ca4fa302617998d1b1252af319ef
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics, including a critical ClamAV detection and an ML classifier. It contains a significant number of external links, indicating a potential link farm or phishing attempt. The embedded URLs suggest a lure related to 'animal cell travel brochure examples', which is likely a pretext to drive traffic to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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=animal+cell+travel+brochure+examples
    • https://cdn-cms.f-static.net/uploads/4486356/normal_5fc263207bd67.pdf
    • https://cdn-cms.f-static.net/uploads/4368746/normal_5f9a4583d3481.pdf
    • https://cdn-cms.f-static.net/uploads/4483104/normal_5fae32b42a9ce.pdf
    • https://cdn-cms.f-static.net/uploads/4372735/normal_5f9faefbf3310.pdf
    • https://zigegawemofeza.weebly.com/uploads/1/3/1/4/131406932/bulijo_navutividonana_bulufigozodogi.pdf
    • https://cdn-cms.f-static.net/uploads/4464863/normal_5fa24506c3bc7.pdf
    • https://lomedalepa.weebly.com/uploads/1/3/4/4/134438906/vixanemutisi_ribebi_bolulu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/satudifin/vubibonutokubimisejapab.pdf
    • https://s3.amazonaws.com/kovilowab/15569776765.pdf
    • https://s3.amazonaws.com/saxefi/18334677389.pdf
    • https://s3.amazonaws.com/retobifulipo/eular_guidelines_gout_2016.pdf
    • https://uploads.strikinglycdn.com/files/1a22096d-12b1-4c5d-8671-0dd1c311ff12/94468089779.pdf
    • https://s3.amazonaws.com/wejuvono/60398564143.pdf
    • https://s3.amazonaws.com/kasuwevovog/deficiencia_de_vitamina_b2.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b3ab.bin
cc8c430e14e4433c6080fe3775c5c6b65dc0974cc02d292e61578741b7bf0cb3
pdf-font-stream PDF embedded font (sfnt) at offset 0xB3AB 5428 bytes
font_01_sfnt_off0000c5f5.bin
0d85cbd9b9a1fac975265d77c6278c5b1daff31da9ad90ea5014b43f145c5df2
pdf-font-stream PDF embedded font (sfnt) at offset 0xC5F5 9472 bytes