Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce9f164745a3f96a…

MALICIOUS

PDF

78.9 KB Created: 2021-06-12 16:09:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 04e657b0c2cad9fbaef5337fcd308869 SHA-1: cd287bb639f08f7511c5e7511eaff63e6d269046 SHA-256: ce9f164745a3f96ad8a6c315fa085f1189a145b0e9b1c8344268bdfc9d389df9
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://queure.ru/pbw?utm_term=forex+price+action+scalping+pdf PDF link annotation
    • https://xizafezepogoja.weebly.com/uploads/1/3/4/4/134446531/5400950.pdfIn PDF document text
    • https://pupizotewijuguw.weebly.com/uploads/1/3/0/7/130775862/zabesije.pdfIn PDF document text
    • https://dawerofe.weebly.com/uploads/1/3/4/3/134361643/pasukinosuzet.pdfIn PDF document text
    • https://feditesar.weebly.com/uploads/1/3/1/4/131483001/58934db97e7c.pdfIn PDF document text
    • https://zegadakupoxak.weebly.com/uploads/1/3/4/7/134749069/tokepafuduwuko.pdfIn PDF document text
    • https://nuzudaguzawoj.weebly.com/uploads/1/3/4/7/134717590/folimavuz.pdfIn PDF document text
    • https://lorumotavur.weebly.com/uploads/1/3/4/6/134693112/153210.pdfIn PDF document text
    • https://tufakuxumiwe.weebly.com/uploads/1/3/1/4/131454237/memoperurubalu-xafunokivu.pdfIn PDF document text
    • https://tivubolo.weebly.com/uploads/1/3/1/8/131857038/ziruwatuwixoba.pdfIn PDF document text
    • https://xakekulipekez.weebly.com/uploads/1/3/4/3/134350488/6697050.pdfIn PDF document text
    • https://dawosovakix.weebly.com/uploads/1/3/6/0/136097295/ponuliji.pdfIn PDF document text
    • https://koxabiniz.weebly.com/uploads/1/3/5/9/135994092/945273.pdfIn PDF document text
    • https://minesipapotevu.weebly.com/uploads/1/3/4/1/134108733/cd789.pdfIn PDF document text
    • https://wesuzimowigimeb.weebly.com/uploads/1/3/4/7/134745326/070588.pdfIn PDF document text
    • https://niwuxepajo.weebly.com/uploads/1/3/4/6/134669398/2529b44be88.pdfIn PDF document text
    • https://fiverepibimasi.weebly.com/uploads/1/3/4/8/134893498/wifami_nowajet.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/345795bf-c953-45c4-b96a-a560a0bbb014/defazaxoxumeruxapolo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80f42847-f298-48e7-a4a1-1d9d63332af4/rheem_tankless_electric_water_heater_installation_video.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/630a61cb-7aee-4f3b-a9c7-7208739135b2/new_holland_451_sickle_mower_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c34c49a-737b-46f4-8a35-00f349a6cbf8/tomalitijed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcd876c9-d909-44d7-bd58-49f21bc8bbea/tegaxepeboxur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71e4b71a-3d1c-4856-bc50-13e61d1a6880/boy_scouts_youth_protection.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_off0000f68d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF68D 5348 bytes
SHA-256: 50b96e49e6f6bc3565e9676f9f78ea8b0272db5e656850ae535edd0047a44e84
font_01_sfnt_off000108d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108D4 10928 bytes
SHA-256: fba2b27868bf2ceae08d3c563e3957b7035b5a260be1447be2f19048af9c1f62