Malicious PDF — malware analysis report

Static analysis result for SHA-256 2713fde62cc3c171…

MALICIOUS

PDF

86.6 KB Created: 2021-03-23 02:33:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 2e8dc07c39ad761430d74116ea62e8f4 SHA-1: 57b35277526c5046f28df66e5a6126fc1680a9ad SHA-256: 2713fde62cc3c171eb5e1d3e67188e4db31bb36de7725e95b334f4efaae05ad2
186 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 0.9993

Heuristics 6

  • 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.
  • 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://fokemale.ru/strik?utm_term=sword+art+online+games+free+to+play PDF link annotation
    • https://biteledazuxol.weebly.com/uploads/1/3/4/3/134315761/jerokomiwun_kekoxirozebidiw_womunoso_sebilat.pdfIn PDF document text
    • https://dibapanapuro.weebly.com/uploads/1/3/0/7/130776085/c0094156ad73.pdfIn PDF document text
    • https://kikafizujugu.weebly.com/uploads/1/3/4/0/134012642/gorirofabidesa.pdfIn PDF document text
    • http://resesovazumo.iblogger.org/godenesupovudamovutuxanug.pdfIn PDF document text
    • https://xixobuba.weebly.com/uploads/1/3/4/8/134898189/xufowapozamirobirosi.pdfIn PDF document text
    • http://prizinsta24.online/nejedxv361.pdfIn PDF document text
    • http://zipezaronin.iblogger.org/20530789596.pdfIn PDF document text
    • http://vugemusobele.22web.org/panamelajofom.pdfIn PDF document text
    • https://wajuzetixageg.weebly.com/uploads/1/3/0/9/130969085/a4eef3bc52a.pdfIn PDF document text
    • https://dunifavopugi.weebly.com/uploads/1/3/5/3/135312205/lixuwu.pdfIn PDF document text
    • http://giocodigital.website/how_to_deal_with_different_learnersnvrj7.pdfIn PDF document text
    • http://gogotmif.space/3d_comic_uninhibitedc7139.pdfIn PDF document text
    • https://bosijoputa.weebly.com/uploads/1/3/4/3/134317673/rulanuxomubem.pdfIn PDF document text
    • https://pugixodazujok.weebly.com/uploads/1/3/2/7/132710779/2685966.pdfIn PDF document text
    • https://metuliwilive.weebly.com/uploads/1/3/4/3/134386481/fuvolotum-xawig-gixazasewutani-xakorufajado.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://56148a0a-83a3-4003-94ff-78d3044b7c00.filesusr.com/ugd/6f5f23_4308fe522315417fb23049ea31c12850.pdf?index=trueIn PDF document text
    • http://bivatirovasivoj.epizy.com/how_to_thread_my_brother_lx-3125_sewing_machine.pdfIn PDF document text
    • http://pevivudawof.epizy.com/37731851429.pdfIn PDF document text
    • https://8c56b32b-3398-45d6-9c0b-b55146621f16.filesusr.com/ugd/6924eb_f12605e22bca4c608f178059c0ade7cc.pdf?index=trueIn PDF document text
    • https://98cdd5c5-c43e-49eb-9373-39517e896cbb.filesusr.com/ugd/90661f_0421d7139171438d8478591a6f9d8b3c.pdf?index=trueIn PDF document text
    • https://bcd7deca-fd5d-492b-a220-d373ca515bc9.filesusr.com/ugd/12f4eb_2df3bfaef6fb41c094893a1fb8e0e68d.pdf?index=trueIn PDF document text
    • http://jipokogave.epizy.com/87034134788.pdfIn PDF document text
    • http://zixoridepub.rf.gd/guvegulolobosakim.pdfIn PDF document text
    • https://e691ad07-92dc-45fa-af10-8929b4045ede.filesusr.com/ugd/87b9a8_da62f8c4b98b4f39b77150905087373e.pdf?index=trueIn PDF document text
    • http://lokutoge.rf.gd/vijixanu.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_off000113ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113EC 5656 bytes
SHA-256: 3fed20438146e7daa718016cf1905027937f307417f46d8b123a997a38f4ea3d
font_01_sfnt_off00012732.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12732 11168 bytes
SHA-256: aa94ff94ea92a34cc6181c36a85447a9c571eda948c2f9cfb32d80b2870f16db