Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ade44f65ce9e295…

MALICIOUS

PDF

74.2 KB Created: 2021-04-30 13:31:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1578eaca5d9b6f5eaed7da7779184ffd SHA-1: c05ec854dc5e23b9782d0da95641324f8d231c1f SHA-256: 9ade44f65ce9e2952445ba769f7b1186ead59d1f45431a2664266ada643f90fc
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 0.9996

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://jottigo.ru/strik?utm_term=what+is+the+treatment+for+scoliosis+in+adults PDF link annotation
    • https://cdn.sqhk.co/forokuxodel/7icxih3/wallpaper_iphone_7_plus_ios_10.pdfIn PDF document text
    • http://wekeb.space/zobugibugr3i0.pdfIn PDF document text
    • https://gibetixogi.weebly.com/uploads/1/3/1/6/131636946/2204117.pdfIn PDF document text
    • http://rifivejawix.22web.org/gipuwi.pdfIn PDF document text
    • http://meriline.store/fusosalazopirotirb3fn.pdfIn PDF document text
    • https://gobunelesivuwol.weebly.com/uploads/1/3/2/3/132303092/5234615.pdfIn PDF document text
    • https://cdn.sqhk.co/bokirebi/ifQiiBR/36372344563.pdfIn PDF document text
    • https://kasexesupa.weebly.com/uploads/1/3/1/4/131437862/6800f50.pdfIn PDF document text
    • http://gapilojazixo.getenjoyment.net/soganiwotowetilu.pdfIn PDF document text
    • https://cdn.sqhk.co/jorimalid/jagchcY/dulinoxonufaw.pdfIn PDF document text
    • http://bexemusu.mypressonline.com/boylestad_12th_edition_solution.pdfIn PDF document text
    • http://findattime.com/5608629573652b4r.pdfIn PDF document text
    • https://lofokuvowuvi.weebly.com/uploads/1/3/4/3/134362742/zipokovuboxeg.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gerabar.epizy.com/13025978477.pdfIn PDF document text
    • https://d1897088-ef6e-4b60-8303-910b4b551fc1.filesusr.com/ugd/4cfbbd_262ffc8f7dfa45debeff84c4e325ff89.pdf?index=trueIn PDF document text
    • http://fiforeru.atwebpages.com/40293823350.pdfIn PDF document text
    • https://86cafecd-0af7-43e6-b578-14605c742a6c.filesusr.com/ugd/c4ddd0_70874cc861c34fe1877c4cdd5fe50907.pdf?index=trueIn PDF document text
    • https://064d663d-f6b2-44cf-a6ad-083da5f315e5.filesusr.com/ugd/77eba6_169edb02463f4fba8711b53d09421dff.pdf?index=trueIn PDF document text
    • https://cfc603e6-7cd4-4c42-812b-9722deb80ae4.filesusr.com/ugd/0e9fc2_32abb9058a9f4d9c97f939795a525ed7.pdf?index=trueIn PDF document text
    • https://61090d85-22e6-4724-b969-52a17785150c.filesusr.com/ugd/952c2e_f5c8c6e3db3d4b1db7b555bf673335e1.pdf?index=trueIn PDF document text
    • http://fakefidefunes.rf.gd/83333224493.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e66d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE66D 5272 bytes
SHA-256: de51f1cd84eed7b064a42170383722bbce54cf998b36533bf83eae1c15eaa685
font_01_sfnt_off0000f83e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF83E 10196 bytes
SHA-256: 9a8277b29b5cbd8592d55091fec79b1df3c74bb688d5b0e398b97929135bc968

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