Malicious PDF — malware analysis report

Static analysis result for SHA-256 2552030dca801405…

MALICIOUS

PDF

81.5 KB Created: 2021-03-23 07:19:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 538f2229841b0ad9cf888a61caffbf6c SHA-1: 5625ba3f3d3bab3e9715bcc9c40dc10d5c6e0628 SHA-256: 2552030dca801405731a45e8724cdbe069752761af1343f8a9481e176e751618
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 0.9998

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://ponafet.ru/strik?utm_term=watch+the+white+princess+season+2+online+free PDF link annotation
    • http://nosetibadap.iblogger.org/harmonisasi_akuntansi_internasional.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479214/normal_600a57fe8df74.pdfIn PDF document text
    • https://xukarujejoxa.weebly.com/uploads/1/3/4/5/134597636/8700307.pdfIn PDF document text
    • https://lukidamovepuk.weebly.com/uploads/1/3/1/4/131437538/2899998.pdfIn PDF document text
    • https://talidifixuj.weebly.com/uploads/1/3/5/3/135390844/gosaritivagizo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366050/normal_6007d145dc580.pdfIn PDF document text
    • http://sagokorize.22web.org/acute_upper_gi_bleed_guidelines.pdfIn PDF document text
    • https://libigidibejaxa.weebly.com/uploads/1/3/3/9/133997225/feted.pdfIn PDF document text
    • http://molipetofokeva.22web.org/android_studio_emulator_enable_bluetooth.pdfIn PDF document text
    • https://tavefagizukog.weebly.com/uploads/1/3/0/7/130775361/864965.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448713/normal_605808708bf54.pdfIn PDF document text
    • https://mifevulesitiz.weebly.com/uploads/1/3/5/3/135321383/jazevu.pdfIn PDF document text
    • https://xokefazekuli.weebly.com/uploads/1/3/5/9/135992394/fotexes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jutatodimat.epizy.com/38121629077.pdfIn PDF document text
    • https://083189c9-8220-4687-a375-57be19a37228.filesusr.com/ugd/909b15_81ab0fa1ac7c43c78039af830313a322.pdf?index=trueIn PDF document text
    • http://tokumizexafu.epizy.com/2012_honda_pilot_service_code_b123.pdfIn PDF document text
    • http://vularamefak.epizy.com/how_big_are_dragons_in_wings_of_fire.pdfIn PDF document text
    • http://tedivepi.epizy.com/13450638363.pdfIn PDF document text
    • https://1639490a-f715-481e-9fb1-af38d332269b.filesusr.com/ugd/a59130_8f0429e3a9184e01be0c5961d0748cac.pdf?index=trueIn PDF document text
    • http://rojugukilajix.epizy.com/tappan_oven_replacement_parts.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_off0000feb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB4 5340 bytes
SHA-256: 1ae0f68818dfe4d7739696a4e4dbc32c76b2d7c5f02e62f97faf64d7b4c330ca
font_01_sfnt_off000110f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110F5 11656 bytes
SHA-256: 3d8b94fa2fad4a2e5c6aa4e56db70347343b8e2f3a6d7b5688875f32bb227935