Malicious PDF — malware analysis report

Static analysis result for SHA-256 36f6c9e2dc049125…

MALICIOUS

PDF

77.9 KB Created: 2021-03-19 22:56:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 841a58641dac26f6fe01d16639fa2c6e SHA-1: 6d3708950c171bd9ea20c5f902af4fe499cf9ae4 SHA-256: 36f6c9e2dc04912502aafaf38fe625728b306a4a65c43b7da2e4b7361263d6b0
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting, suggesting a link farm or redirection mechanism. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://pelibifir.ru/strik?utm_term=hansel+and+gretel+witch+hunters+movie+trailer PDF link annotation
    • http://filozajerezabi.getenjoyment.net/arbor_acres_broiler_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/ziriziwebu/2gejjYv/littlest_pet_shop_toys_for_sale_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/xivomojuf/hhhiib0/notepad_notes_app_reminder_sticky_notes_widget.pdfIn PDF document text
    • http://narixuz.mypressonline.com/cartography_in_geography.pdfIn PDF document text
    • https://cdn.sqhk.co/tobowovum/jaKgc1o/xewij.pdfIn PDF document text
    • http://xadazobisisim.scienceontheweb.net/36692814857.pdfIn PDF document text
    • https://cdn.sqhk.co/pewowutefiw/jhvamjc/34993109312.pdfIn PDF document text
    • https://cdn.sqhk.co/rezebarowed/E5cBih5/20182070145.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fe426b01-1dd0-498a-b08e-7ec37e320b94.filesusr.com/ugd/6b45f0_19ef48c161ec4e53975f377cbc7c0167.pdf?index=trueIn PDF document text
    • https://86146b48-cf95-488a-b5a0-22832f4589a6.filesusr.com/ugd/3b4eee_ed553f9ca8f841309396e055a809646e.pdf?index=trueIn PDF document text
    • https://4868a29a-6d77-448d-a9c5-bc5c6a1713c3.filesusr.com/ugd/060e50_adf8e60152ec437d8e2b2b59e5c3beef.pdf?index=trueIn PDF document text
    • https://eae964be-cf9f-49a8-9b2f-00020d526acb.filesusr.com/ugd/e932cf_89b5c71ba48546b0bdd1ecbffdf2c33d.pdf?index=trueIn PDF document text
    • http://damowepoko.myartsonline.com/2716682202.pdfIn PDF document text
    • https://8569cc17-8b2a-4187-ace0-95b0550b99f0.filesusr.com/ugd/d6eede_48da8cf2e5024d45a4b42e64e021b68e.pdf?index=trueIn PDF document text
    • https://45ae50e1-98a8-4501-9ad6-fc0df438eb43.filesusr.com/ugd/b16523_4f619d4cd3a8437c8b038c19bc1248ce.pdf?index=trueIn PDF document text
    • https://584abdf6-e408-48d3-a53c-4313a8f82471.filesusr.com/ugd/18ee90_bdf709cd749540b48bbea54cb70441fe.pdf?index=trueIn PDF document text
    • https://e905e09d-7ddd-4aab-833c-73500e817873.filesusr.com/ugd/f4c08b_9dfd129c6f3c4f5da5bea3922f99c6ac.pdf?index=trueIn PDF document text
    • https://8a89c5bc-485b-4808-980c-66c60e8d9908.filesusr.com/ugd/834936_113388cee3294cfbb6ad7ef2ab50d11a.pdf?index=trueIn PDF document text
    • https://f7f2eb1f-4ce6-40bf-b337-6bcc2c9c1a95.filesusr.com/ugd/dc6899_a36b7b3a1f4d409e83c4e815c715ed9b.pdf?index=trueIn PDF document text
    • https://d19688e0-347f-4d9d-8cb3-d47c6e049f3d.filesusr.com/ugd/c618e9_cf6b6011c6e141079b476b52d80c110b.pdf?index=trueIn PDF document text
    • https://c78267de-509c-4cb0-9394-6b21b7876e04.filesusr.com/ugd/290ce3_0b0a8286663d449182e4b8ba5b299db6.pdf?index=trueIn PDF document text
    • https://cef8af8d-7071-4339-ac50-fc417d371010.filesusr.com/ugd/a89196_c8016ec60e0849dba9964c0aecb8bf21.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_off0000ecb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB4 5464 bytes
SHA-256: 5f942a5bc3a8d64d49e4e9f88e616a7adb5d00ad8a8787b8051989a5f0bf0af2
font_01_sfnt_off0000ff36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF36 12444 bytes
SHA-256: 752eda0c2b6330804fc3a5462d3dd2c75a628b0598425ca819b9046e956e965c

Open this report in the interactive analyzer, or submit your own file for analysis.