Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ec6ee0c606bfda3…

MALICIOUS

PDF

81.8 KB Created: 2021-04-01 14:13:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 9cb5578f804b36970147b2717dfa35fd SHA-1: e21675a49897c3cef296894772e04e197a6f554d SHA-256: 9ec6ee0c606bfda3165418ae54900a2c9de20207be38088623f899465b441e73
66 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, with a high-confidence ML classifier flagging it as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, suggesting an attempt to obscure malicious destinations. The primary malicious URL identified is https://lozipotod.ru/strik, which is likely used to redirect users to further malicious content or download a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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/strik?utm_term=clasificacion+de+las+cuentas+nominales+o+de+resultado PDF link annotation
    • https://cdn.sqhk.co/bogijifaviba/cvhjheW/linear_regression_formula_statistics.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424985/normal_5ffa62bcaaa68.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470985/normal_6015bac2dfa82.pdfIn PDF document text
    • https://cdn.sqhk.co/dorodidur/hHAajgb/97089033446.pdfIn PDF document text
    • http://uplrezina.site/superhero_coloring_pages_for_adults8ko1d.pdfIn PDF document text
    • https://cdn.sqhk.co/dikozogub/bkdgdJ5/ximiridudofufisitiduwatup.pdfIn PDF document text
    • https://cdn.sqhk.co/molodomo/jgzjgii/vevelitifupafudi.pdfIn PDF document text
    • https://cdn.sqhk.co/bomumuxa/hLQfgji/first_birthday_cake_ideas_for_baby_girl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412584/normal_60593a701e700.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454559/normal_60611d9d6340b.pdfIn PDF document text
    • http://limaxinsto.xyz/tupip33nxu.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/49640e6c-3758-4cda-bb31-394fa976f078/what_is_mindless_eating.pdfIn PDF document text
    • https://a943cdc4-551e-4fd6-8842-bb1c82e441e2.filesusr.com/ugd/a0303e_9552632eb3d4444fb25ca7bf8505fb95.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dixaleko/84450209729.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/566cc215-493c-45bd-b552-1171bd23d175/dorumomuluretokis.pdfIn PDF document text
    • https://83d7d1d1-3661-4158-a2cc-78aa4aa39d08.filesusr.com/ugd/163759_691a8033c2814710950887ba5ab1be12.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kubafezin/ruwuje.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/190eaf23-1011-4fdb-b80d-b80122d4e637/how_tall_are_400m_hurdles.pdfIn PDF document text
    • https://83d12552-0bc1-4415-b221-1da25caacb9b.filesusr.com/ugd/1e11d0_971f83f236fc4910b93af007747b155a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2d42c74-bf28-4435-9fea-c143d0bfd112/delta_flight_attendant_pay_rate.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eaf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAF2 5072 bytes
SHA-256: 5ba279998f4ec6d16bf589313cc64b11c86522d94944f1ddde7787592f5c2d16
font_01_sfnt_off0000fc15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC15 11560 bytes
SHA-256: 1f99d4b8c21b48b89474af81d81b66c3de406883a6a814413b6340dc017b3649
font_02_sfnt_off0001221b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1221B 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd

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