Malicious PDF — malware analysis report

Static analysis result for SHA-256 e47d18fe2c1bd107…

MALICIOUS

PDF

75.9 KB Created: 2020-12-28 01:12:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 66a177d0d8b452de6ba21fb23330b3d0 SHA-1: 928007db939ee8ad0007761af60668523a050ae2 SHA-256: e47d18fe2c1bd1076c5339c9de57c1911c180d93f0b69dda0f108488e6c8f58e
156 Risk Score

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://trafficel.ru/strik?utm_term=business+analyst+certification+courses+for+beginners PDF link annotation
    • https://xodasolilixodi.weebly.com/uploads/1/3/4/8/134874129/29d347f.pdfIn PDF document text
    • https://vawevoza.weebly.com/uploads/1/3/1/4/131482963/teluwil-vumopato.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/1045037.pdfIn PDF document text
    • https://jolibudowuw.weebly.com/uploads/1/3/4/5/134596284/sugemebu.pdfIn PDF document text
    • https://ravidaxixow.weebly.com/uploads/1/3/4/3/134315840/1830972.pdfIn PDF document text
    • https://cdn.sqhk.co/tezikegoj/2Nidpgf/57446595718.pdfIn PDF document text
    • https://tugajepefur.weebly.com/uploads/1/3/1/4/131453805/e9756cb1c6.pdfIn PDF document text
    • https://kirewigofe.weebly.com/uploads/1/3/4/3/134382955/derareduwogeva_fuwarun_fefotiwefimi.pdfIn PDF document text
    • https://cdn.sqhk.co/mepetiruzi/Q0PYxje/broadway_umc_paducah_live_streaming.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/mafavuzenoliki/51927396923.pdfIn PDF document text
    • https://s3.amazonaws.com/wexukufedepim/english_hd_movies_free_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/internet_manager_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/xafaxotaful/animax._mn_app.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_off0000ecd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD8 5340 bytes
SHA-256: 91d390fcd540468da1933eb47581a76716efc4b1e3bc281eb9420577244b89b7
font_01_sfnt_off0000ff24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF24 10484 bytes
SHA-256: ad587596ac1c52fd5f0804eaa8179ec3c4b75bf8dd039b16d60cc16fb1796cc7