Malicious PDF — malware analysis report

Static analysis result for SHA-256 62b4b8d0120d2039…

MALICIOUS

PDF

77.9 KB Created: 2021-03-12 02:16:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 465208b30b334d5ecf1849f8c0b75e60 SHA-1: 343ebbec3921cf64a1c0f21dc7bc1a6b94e7ce7d SHA-256: 62b4b8d0120d20395a9bcbf4a4a6d9cdd436c42bc8955d49a3ff1dd3b5f37526
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 0.9991

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://midufefew.ru/wix?keyword=rover+ruckus+game+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368496/normal_601e89f8dfa65.pdfIn PDF document text
    • http://vadanunagirira.getenjoyment.net/82896234867.pdfIn PDF document text
    • http://pozijuza.scienceontheweb.net/nordictrack_c2255_owners_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392864/normal_60370dcc949d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475196/normal_5fd2d1463ff62.pdfIn PDF document text
    • https://cdn.sqhk.co/gexopoku/dJiXDJQ/synthesia_keyboard_lights.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418583/normal_5ff712db53227.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423700/normal_60155805aad08.pdfIn PDF document text
    • http://ribavid.medianewsonline.com/the_ballad_of_black_tom_audiobook.pdfIn PDF document text
    • http://rijigikesezaga.mypressonline.com/cashflow_quadrant_book_in_hindi_free_download.pdfIn PDF document text
    • http://kefudepoduwudi.sportsontheweb.net/16504924057.pdfIn PDF document text
    • https://cdn.sqhk.co/surikuzezun/LlWjiGy/dezigopepuben.pdfIn PDF document text
    • http://gopusoduj.mygamesonline.org/61240673300.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369786/normal_5fc59320ec546.pdfIn PDF document text
    • http://lulopoboxefon.scienceontheweb.net/pokaseduxafubarapawa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366989/normal_5fe880e4843a7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413109/normal_5fe148222f5d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374537/normal_603e585742444.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://33c7e2ec-32fc-4676-a642-9d95a4379e01.filesusr.com/ugd/622218_55f3350cbc014d0db353ab2f8e9f8758.pdf?index=trueIn PDF document text
    • http://tofujuwo.onlinewebshop.net/67296788513.pdfIn PDF document text
    • https://a4758657-6aaa-4003-b0f6-1957e800abfd.filesusr.com/ugd/70c1f8_b986ff1ff691445fb74466d2bd48dfef.pdf?index=trueIn PDF document text
    • http://siniligavaxuvul.onlinewebshop.net/motixe.pdfIn PDF document text
    • https://8d684a1e-4078-49cd-b336-05adf09473b6.filesusr.com/ugd/2b25e8_eb0dc805f39444cd9aa956960f96c3e3.pdf?index=trueIn PDF document text
    • http://zubiluwetij.myartsonline.com/79076405362.pdfIn PDF document text
    • https://b2bd4247-5771-4f9a-9f3f-b46500bff287.filesusr.com/ugd/f41bfe_94975217f1cf488d89f004f2fa660b91.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_off0000f252.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF252 5248 bytes
SHA-256: 744b0d456e87bcff517e96f20ffe3e32bd0ad365b99ad3a4dfc0e5534075ab35
font_01_sfnt_off00010428.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10428 11236 bytes
SHA-256: 0ca44374bfdbdcec779e9a3aa130983860adc5ff088dde1fa456dd67a56c80c1