Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaf8898d63053f06…

MALICIOUS

PDF

74.9 KB Created: 2021-04-15 06:52:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0f0fccfdcaf4b6236c604b90f535797e SHA-1: 1d4c3fecd9497413ef5b16504cc08982787baed5 SHA-256: eaf8898d63053f0652d0ebf34a2dc0d37a1a4e87aea405025fdae22d7e79b91a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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://mezovuduw.ru/strik?utm_term=how+many+hours+can+you+record+on+directv+genie PDF link annotation
    • http://depupejaxidolip.22web.org/zirikesijipivolet.pdfIn PDF document text
    • http://rubeatyshop.xyz/94999263636luy0d.pdfIn PDF document text
    • http://1xbet-registr.site/6315202974342dfy.pdfIn PDF document text
    • http://mnatural.space/texozamhky4p.pdfIn PDF document text
    • http://myyshooop227.site/m._b._a_di_full_formrs10j.pdfIn PDF document text
    • http://zoom-omsk.ru/shipwreck_beads_reviewsuniw8.pdfIn PDF document text
    • https://gofegupozomo.weebly.com/uploads/1/3/4/4/134479888/4535144.pdfIn PDF document text
    • https://tevunuxewime.weebly.com/uploads/1/3/1/4/131452804/lopemivija.pdfIn PDF document text
    • http://diwizog.22web.org/jigide.pdfIn PDF document text
    • http://fc-aromat.ru/natural_imagine_dragons_piano_sheet_music_freeihvk2.pdfIn PDF document text
    • http://acgmgroup.ru/308555535590sopb.pdfIn PDF document text
    • http://raisinslabs.club/ragare93j95.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vepejatudededok.rf.gd/blank_comic_book_pages.pdfIn PDF document text
    • http://kitivej.epizy.com/28530795975.pdfIn PDF document text
    • https://0ea1ff7f-05b3-43a2-9744-178351a05ed1.filesusr.com/ugd/01f9b9_21783333e1aa4b55b03ad66abf133f0b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vojapu/29322498835.pdfIn PDF document text
    • https://abc5f1b3-ad37-4660-b048-d9bff2240d70.filesusr.com/ugd/a1fb68_b9168be1dda642eea60e64b0f128f49d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/masovodosuwakivikizazuxi.pdfIn PDF document text
    • http://dodarululi.epizy.com/renewable_energy_sources_book.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_off0000e583.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE583 5536 bytes
SHA-256: 951ca0bec2a24e865e86694c281b693467fac12d8069e7ab67db1fe0b00d6fc7
font_01_sfnt_off0000f840.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF840 11204 bytes
SHA-256: 2edd4fc37dd03c2fa1044cca06f35aca6487686209dc0b6d3f9eb2ce3257abfc