Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e92ce4017c7d2f8…

MALICIOUS

PDF

77.8 KB Created: 2021-03-04 15:45:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: e5d449349e7821e445d1c6a0452f343f SHA-1: d8fffe1b9b878becfe4d3168b900dd5482bbe684 SHA-256: 6e92ce4017c7d2f8a59f7317c753d5324eb316fb63a6a4b4c7b36d2dc6c68f07
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://bologen.ru/wix?keyword=presente+progresivo+worksheet PDF link annotation
    • http://gazagidumow.mygamesonline.org/logic_pro_10.1_system_requirements.pdfIn PDF document text
    • https://pasugewu.weebly.com/uploads/1/3/1/0/131071180/4bdd602.pdfIn PDF document text
    • https://cdn.sqhk.co/janurisu/Pgcjgid/durizugitafonojo.pdfIn PDF document text
    • http://fejugutafilevin.scienceontheweb.net/11108321317.pdfIn PDF document text
    • http://tinivoze.22web.org/companion_character_sheet_5e.pdfIn PDF document text
    • https://bafizotadax.weebly.com/uploads/1/3/4/7/134761596/xakodo.pdfIn PDF document text
    • http://dizurexemubegog.mygamesonline.org/plantronics_backbeat_fit_3200_ou_3150.pdfIn PDF document text
    • https://cdn.sqhk.co/kososojog/nEhhicg/break_down_the_walls_lyrics_chris_jericho.pdfIn PDF document text
    • https://ranerenonosojib.weebly.com/uploads/1/3/1/4/131483420/mivejolar.pdfIn PDF document text
    • https://cdn.sqhk.co/vidikusupegu/uifgeji/where_to_watch_pulling_moves.pdfIn PDF document text
    • http://jasetukuxazep.22web.org/suncast_aquawinder_hose_reel_instructions.pdfIn PDF document text
    • https://miravavomi.weebly.com/uploads/1/3/1/4/131410597/diwimotusuzaruwu.pdfIn PDF document text
    • https://bamukafigozoxin.weebly.com/uploads/1/3/4/8/134861202/6eb6d91eecf926.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8964868a-aef6-4da0-9a9b-29de7c28e0c5.filesusr.com/ugd/b910ae_bd27d898e0f844e1b472f12b7ff770ca.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/neboteb.pdfIn PDF document text
    • https://s3.amazonaws.com/wutogugej/kenmore_microwave_model_721_parts_diagram.pdfIn PDF document text
    • https://s3.amazonaws.com/rojalexipokadaz/damebaso.pdfIn PDF document text
    • https://69df74eb-9f83-488d-97bb-abb55063df61.filesusr.com/ugd/f34323_4b3e33628c47493d97a95a49de38cd61.pdf?index=trueIn PDF document text
    • http://lununobasafino.rf.gd/zig_ziglar_goal_setting.pdfIn PDF document text
    • https://s3.amazonaws.com/jivagajamav/25075235084.pdfIn PDF document text
    • https://9eaa565e-fb97-40b4-b096-d6760803f699.filesusr.com/ugd/55e2c6_953324c78ef4454e8512636e4c46512c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/govani.pdfIn PDF document text
    • https://dc273c12-e125-4738-b2e6-b96bc4bd5eb7.filesusr.com/ugd/c8df25_d1fcd824172d4844af31cc47a778db65.pdf?index=trueIn PDF document text
    • http://bivojeda.atwebpages.com/30665902663.pdfIn PDF document text
    • https://983c8978-ad56-435f-a988-47358aa6040c.filesusr.com/ugd/06a663_5816415df90a4a09b7f3919c06a7d083.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_off0000f379.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF379 5056 bytes
SHA-256: cd8cfa691a33c0bbd9f51ac5ef57b2f07919d23ed342a1f7be8f5b397de12a4b
font_01_sfnt_off000104c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104C5 10700 bytes
SHA-256: b181b2d47834d05a65b168dd95a132b314e2f5bcfac12ab59631838d550d5480