Malicious PDF — malware analysis report

Static analysis result for SHA-256 584d6c6812ea68c6…

MALICIOUS

PDF

115.7 KB Created: 2021-05-30 00:04:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: dcfaf666c4c3ac867568a4d203993839 SHA-1: d8130d7c43fdb0fff65f54e22274ab0136882bb9 SHA-256: 584d6c6812ea68c678fcd1246bddafc366442019f39fab00beb82df7aca3dc4e
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards a phishing or malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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/123?utm_term=beyblade+series+1 PDF link annotation
    • https://koponabunabo.weebly.com/uploads/1/3/4/5/134520941/moxex-gakenu-nofunogodoromej-fisuxifodomigo.pdfIn PDF document text
    • https://gejizataki.weebly.com/uploads/1/3/3/9/133997606/dutotobu.pdfIn PDF document text
    • https://nipaxibovaj.weebly.com/uploads/1/3/1/3/131379211/judofelamopulif.pdfIn PDF document text
    • https://kivifakan.weebly.com/uploads/1/3/4/8/134870172/xusotela_bawedorotujof_xegumi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369647/normal_60184985ebe5b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473049/normal_5fe49d640f3a7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469634/normal_5fce580a08b17.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380871/normal_5fd0905b50cf0.pdfIn PDF document text
    • https://jemogofeti.weebly.com/uploads/1/3/4/0/134042608/jijipomi.pdfIn PDF document text
    • https://vixijusodu.weebly.com/uploads/1/3/0/7/130776714/df90410bc4e81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383340/normal_605044e498431.pdfIn PDF document text
    • https://wapixetisabin.weebly.com/uploads/1/3/4/6/134685373/b04b128.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454672/normal_60439665efd86.pdfIn PDF document text
    • https://tovoginimu.weebly.com/uploads/1/3/4/3/134379987/kuginotapeda.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/993285d1-e683-439b-801c-842c49096303/vujezisogabisanagek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1585fa06-e6f0-43a3-b4f3-7507d04e6e39/is_grays_anatomy_a_good_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2627a62-312e-4f11-9438-d371d7b5cc31/how_to_put_decals_on_gel_nails.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91fc946f-96d4-4124-94f7-2c9f9736f8f2/bikosa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22146382-82bd-4995-8283-02208f496171/mesomoraxoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e965cbbc-89a6-44e4-9e8c-8fe70b97b7ea/the_river_wild_cast_kid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c684e0b6-057b-436d-8278-b736ce7ae21c/witasojavunaretazujo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/096410ab-9963-4794-a6cc-8cced77c562d/2005_ford_f350_utility_truck_bed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b85e73b3-fc13-4eb9-a358-cfb55319bc13/viking_oven_repair_service_near_me.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016fd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16FD6 5048 bytes
SHA-256: d7c4db35c3963aa9462547170603b86d34684a4a5b9c2159ee0c4c670134c0a9
font_01_sfnt_off0001815e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1815E 5164 bytes
SHA-256: 390ed79951689e79a9f4465edaa876db4316afeaa94bb4a31e024e3df943c0a1
font_02_sfnt_off00019303.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19303 14960 bytes
SHA-256: 4ca92399b5d226ab58d005259e7cd5bf9264605bfc2f46fb8195a87c3308f445

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