Malicious PDF — malware analysis report

Static analysis result for SHA-256 49466290384a2066…

MALICIOUS

PDF

77.8 KB Created: 2021-05-15 09:33:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 97b90e24cd12486584d11157e8c90150 SHA-1: 181d7e9bf7263570a5a000cc8022d12488416493 SHA-256: 49466290384a2066f3a0649196a9493908dc1762826c62cfeee16657715a6aa9
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 0.9990

Heuristics 6

  • 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 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://jottigo.ru/strik?utm_term=what+are+the+best+perfume+scents PDF link annotation
    • http://uscovidcharts.com/how_to_watch_big_little_lies_australia6iqmf.pdfIn PDF document text
    • http://kartaidatodemeleri.com/can_you_check_your_child_support_balance_online735qp.pdfIn PDF document text
    • https://xurexesezegurez.weebly.com/uploads/1/3/4/0/134096141/pazevapevir.pdfIn PDF document text
    • https://lojexidipiwakif.weebly.com/uploads/1/3/4/0/134041559/poripijigaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425507/normal_606370c5da1a1.pdfIn PDF document text
    • https://vupixesit.weebly.com/uploads/1/3/2/7/132740805/jujobadokejav-mizogopami-reliruvo-dipuzovukedeb.pdfIn PDF document text
    • https://vumetubav.weebly.com/uploads/1/3/0/7/130776444/pajusolejunud-kitir-rasumakigizu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386336/normal_60301208b3785.pdfIn PDF document text
    • https://bofisolipog.weebly.com/uploads/1/3/4/4/134438855/8270174.pdfIn PDF document text
    • https://jomagikovire.weebly.com/uploads/1/3/1/4/131408086/2354818.pdfIn PDF document text
    • http://praktika-ingenieur.com/vuxuwezovgztos.pdfIn PDF document text
    • https://vilamewu.weebly.com/uploads/1/3/0/7/130775649/3db93d.pdfIn PDF document text
    • https://gazobibulome.weebly.com/uploads/1/3/4/7/134775133/dabaxonawemuru.pdfIn PDF document text
    • https://jonilokakowoso.weebly.com/uploads/1/3/1/4/131453896/68405d22.pdfIn PDF document text
    • http://rafale.store/antenna_channel_guide_los_angeles6c2pj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447450/normal_5feb1a5fba071.pdfIn PDF document text
    • https://xezajorawelo.weebly.com/uploads/1/3/1/4/131408008/41e0b7cbe6ed.pdfIn PDF document text
    • https://duxoberadu.weebly.com/uploads/1/3/4/7/134718286/5937394.pdfIn PDF document text
    • https://jubibesu.weebly.com/uploads/1/3/1/3/131379113/bdd8380.pdfIn PDF document text
    • https://mipafalubered.weebly.com/uploads/1/3/4/0/134017716/9067162.pdfIn PDF document text
    • http://fragcups.com/segitumijofamofobinezaiht6g.pdfIn PDF document text
    • https://nutiniwe.weebly.com/uploads/1/3/4/8/134870290/6fe28aed71.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://d25e5d79-f3dc-43ab-8538-58f2f4730235.filesusr.com/ugd/898300_4fdff106134f42c7913efd9ee14f1fba.pdf?index=trueIn PDF document text
    • https://04a80c79-134c-446e-801b-0c1635678e59.filesusr.com/ugd/5cebf8_b7829ff638b140cd849b1d997c220387.pdf?index=trueIn PDF document text
    • https://caf0f927-206f-4b4e-aa34-0dd3da53679b.filesusr.com/ugd/83d902_a142c310336e4534bbad2a832c7613ba.pdf?index=trueIn 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_off0000f0f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0F7 5376 bytes
SHA-256: f5f208bf943979454684084cfcf98ffb2a47fb932a4688f7cd5c9ceb01f40fee
font_01_sfnt_off00010322.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10322 11176 bytes
SHA-256: a40886bc91beb17ab2a4f647fc9ee5a6050102af47abee7bd91eb724b5cdd9d7