Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1cd30d8816af4d5…

MALICIOUS

PDF

79.5 KB Created: 2021-03-05 01:55:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 152cfe9f2812b88c353b0daf8d8865a4 SHA-1: f107b9923bacd19f33a8e67ed50fa29f93731743 SHA-256: b1cd30d8816af4d5705f9fb5f810f6b2618359566a1cb6051dd2dba76862e219
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nipisod.ru/strik?utm_term=organic+chem+nomenclature+cheat+sheet PDF link annotation
    • https://cdn.sqhk.co/dofexoxev/uigfghv/tikel.pdfIn PDF document text
    • https://tonituligavu.weebly.com/uploads/1/3/4/8/134884188/japolajagofo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483103/normal_60226108de505.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446490/normal_5ff0406a8b00b.pdfIn PDF document text
    • https://memibufosigi.weebly.com/uploads/1/3/1/3/131383384/kipazetefamok.pdfIn PDF document text
    • http://gadetebes.sportsontheweb.net/autocad_student_account_sign_up.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408188/normal_5ff278b763c6a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366311/normal_5fc7aa1058186.pdfIn PDF document text
    • https://guvijubeb.weebly.com/uploads/1/3/5/3/135318684/vefitenu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375891/normal_5fe1e9560cd26.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxodokoju/koZgdjh/diamond_digger_saga_mod_apk_android_1.pdfIn PDF document text
    • http://rejorevubirobu.sportsontheweb.net/6864443448.pdfIn PDF document text
    • https://cdn.sqhk.co/gukisafuw/gf5MtyL/real_madrid_football_t_shirt.pdfIn PDF document text
    • https://limuvowefegepud.weebly.com/uploads/1/3/4/5/134509231/e741ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422385/normal_6039457fa1c68.pdfIn PDF document text
    • https://cdn.sqhk.co/zudilubal/jjAifd9/polutif.pdfIn PDF document text
    • http://jesofoma.getenjoyment.net/why_is_my_dishwasher_not_draining_properly.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://59e5a08b-0d8d-455f-a3a7-35a3b781ab3e.filesusr.com/ugd/784815_0c0e7c65789742a68d99c6d6cd6e1571.pdf?index=trueIn PDF document text
    • https://769966b8-4adc-437e-bba8-f198cf6e171b.filesusr.com/ugd/41a0b6_b88063d017ec452e9c90fca83a539ea6.pdf?index=trueIn PDF document text
    • https://fa90eb46-aa9b-4fd1-a2e8-e903ec8e50a4.filesusr.com/ugd/575fb0_fbfb23a5b07f470f816e929c65a63fae.pdf?index=trueIn PDF document text
    • https://95a57b4d-a24c-4412-bd87-88f4f885d252.filesusr.com/ugd/011e4b_03614774571240ba829e01384c31c18f.pdf?index=trueIn PDF document text
    • https://874c0fd6-92eb-497b-905f-dc7ca4d2e287.filesusr.com/ugd/5ca7d4_1bd51ec7dce5449a9ce97d5f1af478b9.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC22 5120 bytes
SHA-256: e5a3a1d208d0d65c1ed37940e2cd0cb76e303861f6174714c55c10879712c1a8
font_01_sfnt_off0000fd5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD5B 11016 bytes
SHA-256: 4e1a8394cb86bc1149bc546431faf7d179834c57ccd0d63316ad90949216fbc5
font_02_sfnt_off00012215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12215 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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