Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b06821d9b911ab9…

MALICIOUS

PDF

80.2 KB Created: 2021-04-05 19:46:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 9d9ea0062e6f4b541f9dc11088fa1c9d SHA-1: c7b5a425ed14ee267754bf661ef1ffe6327c73c2 SHA-256: 2b06821d9b911ab95598cd7d8af2d87f3d7c58604527fd85e02dc6d03b4169c4
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier. It functions as a link farm, containing numerous external URLs, with one prominent URL pointing to 'lozipotod.ru'. The presence of a large number of links on disposable hosting suggests an attempt to distribute malicious content or conduct phishing operations. No scripts were extracted, but the overall structure and URL distribution indicate a malicious intent to redirect users to potentially harmful 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://lozipotod.ru/award?keyword=gnss+systems+pdf PDF link annotation
    • https://cdn.sqhk.co/lasesekov/dZbHhfw/14472773100.pdfIn PDF document text
    • https://cdn.sqhk.co/norowitidot/h1uA8Wm/mufekanegejudowa.pdfIn PDF document text
    • https://sijetuso.weebly.com/uploads/1/3/4/4/134499475/zalupunenatam.pdfIn PDF document text
    • https://puzomukasudugun.weebly.com/uploads/1/3/4/8/134865935/pezimat.pdfIn PDF document text
    • https://cdn.sqhk.co/fijufupuga/YNZdidi/72036332317.pdfIn PDF document text
    • https://xawavefite.weebly.com/uploads/1/3/4/6/134667803/240779.pdfIn PDF document text
    • https://sazofezobixana.weebly.com/uploads/1/3/4/5/134524546/8792395.pdfIn PDF document text
    • https://loxoxonejuk.weebly.com/uploads/1/3/4/6/134684666/8632369.pdfIn PDF document text
    • https://gupexududoteg.weebly.com/uploads/1/3/5/3/135302954/momid_vemepunadazaped.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://49432a94-54bc-4d13-9d12-ea41d731e1b8.filesusr.com/ugd/a7c689_6c0d1fb1728844d7aa36d108c0b19083.pdf?index=trueIn PDF document text
    • https://efed9c07-4553-4484-a419-1b844d271aeb.filesusr.com/ugd/6f475a_42c7c003255a4df89853a7625875d0dc.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/57c0077b-4d34-41c5-b86b-30940bc7a6e8/how_to_drain_water_from_keurig.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2923a84e-45bf-4ff1-bc09-c7bf8e2c0393/bojuvezufekazabev.pdfIn PDF document text
    • https://f1cb2ec4-a82d-4768-8a06-5236a2db220e.filesusr.com/ugd/a2e20a_e76132db60a340488dcdd593ff05b87c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/91376fa9-7699-4bb3-a333-6387a7c7952b/45750293109.pdfIn PDF document text
    • https://52cfbdcc-51c1-4e85-ba83-ad74149b4620.filesusr.com/ugd/93d431_dc39893d2d094074abd0c87e87306bca.pdf?index=trueIn PDF document text
    • https://aa6d2f86-95e2-42cc-897e-6bbd71c3a116.filesusr.com/ugd/78daac_146aa9cd290746da803f683762955daa.pdf?index=trueIn PDF document text
    • https://320f262d-053d-461a-9009-498fa3b044f5.filesusr.com/ugd/8e680a_0d4884bffe3340328821a960dded9927.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7b94420-bf46-447a-b306-24e82c5eb69f/magic_chef_countertop_ice_maker_model_mcim30sst.pdfIn PDF document text
    • https://3bdad275-8828-414d-9063-9532e035d791.filesusr.com/ugd/c67d0c_ca2dad0642cc4f7abd935e8da2b0aa72.pdf?index=trueIn PDF document text
    • https://b9a4c3d6-4ccf-4d04-9b0f-c2e9c357e15d.filesusr.com/ugd/e5cbe5_d99cb21e466049dda3d99282da313f11.pdf?index=trueIn PDF document text
    • https://1801fa0f-56e4-4894-8452-b8e06651d4be.filesusr.com/ugd/868401_e7aeeb48af064ae5a89757a12a62d262.pdf?index=trueIn PDF document text
    • https://7d6e376e-1ee3-4df5-88c1-8d1511d419f8.filesusr.com/ugd/7dd30d_413a6a5813dc418a9dea8482d60001ee.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/489ea368-5a49-4e96-9b8e-e14b9a33a836/donejaz.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE5A 4984 bytes
SHA-256: 39d1da1658159186629564e9a3d07719de6979857b8a7ab558fa3bcf8484d2dd
font_01_sfnt_off00010f51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F51 10672 bytes
SHA-256: dd5bba81459f3d0ae4cfb6b1e40b1ae43ff4bc7b580767cb6d8d0c111370985f

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