Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e2cf37b43c86be5…

MALICIOUS

PDF

78.8 KB Created: 2020-11-13 05:19:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: ae34027894f1a1d55d8f83eb904b681b SHA-1: 18c83141f906ff6dd56229b73ae68b7d0c45df03 SHA-256: 9e2cf37b43c86be5d3454c8c4f45c79f5330f7160a00694b1ea8fd9279aab955
126 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it's a link farm on disposable hosting. The embedded URL 'https://traffset.ru/aws?utm_term=aisi+1020+standard+pdf' is a primary indicator of a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffset.ru/aws?utm_term=aisi+1020+standard+pdf PDF link annotation
    • https://jonipafatanepa.weebly.com/uploads/1/3/2/7/132741476/jadejetadovexaju.pdfIn PDF document text
    • https://sugiravo.weebly.com/uploads/1/3/4/4/134455537/b88f54081.pdfIn PDF document text
    • https://mijisurux.weebly.com/uploads/1/3/1/0/131070147/xalurawi.pdfIn PDF document text
    • https://kulufitobapesad.weebly.com/uploads/1/3/4/4/134443603/af979c.pdfIn PDF document text
    • https://zoditivifu.weebly.com/uploads/1/3/4/3/134316547/5158408.pdfIn PDF document text
    • https://teraxawazolazov.weebly.com/uploads/1/3/4/3/134386914/4541541.pdfIn PDF document text
    • https://surudebed.weebly.com/uploads/1/3/4/5/134513173/6691401.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e6160b8-d18f-434c-aef4-86c494bc45e4/atualizao_gps_multilaser_tracker_tv_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b786a83b-aa7c-4507-a12f-c32f74654778/29534523834.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/519c59ad-d31e-4260-8916-a500bc5a9b8f/2774723572.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c481b4e-071e-4fe5-adda-179f4eb79f3b/97054740685.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b022f425-b0fb-4583-b6a9-3aa9dde04578/wifuzono.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/vagumazagipufitugipum.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/christian_worship_english_songs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e04fc27-aa9e-4c8d-baa9-5532ed08b4b2/30443676711.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f2f551b-64f4-473a-a70d-d25e4ea67ffc/polaroid_7_inch_quad_core_tablet.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE76 5316 bytes
SHA-256: 463a54b446756ea279220bd50c3b04ab7fb5fc0139df5977580c1cb2406ad068
font_01_sfnt_off0000f0a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A2 12324 bytes
SHA-256: 1493d78bff6e0b36a3ae36da233a97001a782d75df17aa235a908a0ce46f0b5f
font_02_sfnt_off0001191d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1191D 16108 bytes
SHA-256: e001c597270b809e29233e8f225ce2233bc1e1940bdeed8b82dd88b27ca90453

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