Malicious PDF — malware analysis report

Static analysis result for SHA-256 68027c320261beb2…

MALICIOUS

PDF

72.5 KB Created: 2021-02-23 13:00:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 1b590f29c469067c069d1bc78b05e2e5 SHA-1: 5e20d8342ef378339b197d785542de4631cfc1e5 SHA-256: 68027c320261beb2460dd41a6e130812d7a5b9296814fb97fadbe1803d8f231f
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. It contains numerous embedded URLs pointing to disposable hosting and potentially malicious domains, suggesting it's part of a phishing or malware distribution campaign. The presence of external URIs and link farm characteristics further support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/strik?utm_term=m+audio+oxygen+49+iv+49+key+usb%252Fmidi+keyboard PDF link annotation
    • https://mukoxawav.weebly.com/uploads/1/3/4/6/134627731/jowebuvodu.pdfIn PDF document text
    • https://jefaganogebe.weebly.com/uploads/1/3/1/4/131437435/5793582.pdfIn PDF document text
    • http://fiduvizowema.iblogger.org/interzone_1000_product_data_sheet.pdfIn PDF document text
    • https://pubodepilup.weebly.com/uploads/1/3/1/4/131406337/puvexomakeramit_guvikutubejam_golodizu.pdfIn PDF document text
    • https://cdn.sqhk.co/mutexeze/ieT3khe/36087190348.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496165/normal_60137680441c8.pdfIn PDF document text
    • https://cdn.sqhk.co/kimazibo/BpZhheb/lukiwaxafawasipoferine.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwonesi/f1iaYlq/dora_and_friends_games_charm_magic.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414687/normal_5fdfb6ace3c9a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465941/normal_5ffea1a1695e1.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/sesafefanulokam/gonakorunapemajemaj.pdfIn PDF document text
    • https://s3.amazonaws.com/fifuto/is_milorganite_safe_for_bees.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_off0000d5ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5ED 5832 bytes
SHA-256: a7cb2f28d6e6750cfe9b3e01b479bd4eca6d02b331a503f2886ca901fb23c217
font_01_sfnt_off0000e9d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D9 13632 bytes
SHA-256: f6265fe1c3747a377bd4b68c20ad436ae8037fa18fa40a66914272418fcb71df

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