Malicious PDF — malware analysis report

Static analysis result for SHA-256 f140e6ac35d49c6c…

MALICIOUS

PDF

71.9 KB Created: 2021-03-25 07:40:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: a069bc3d8b46ce304f12fd0fab8f8b99 SHA-1: 19ebe0fb6e9a13a1f0c3d7dddae94b80fcf9f305 SHA-256: f140e6ac35d49c6c264bc48339fd39c8284c7d9048b4e13a01b85eae54e367c6
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm designed to direct users to various websites. One prominent URL, 'https://dugedepap.ru/award?keyword=educational+leadership+journal+articles+pdf', is flagged as suspicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery through these links.

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://dugedepap.ru/award?keyword=educational+leadership+journal+articles+pdf PDF link annotation
    • https://salexutoxor.weebly.com/uploads/1/3/4/7/134761189/2621446.pdfIn PDF document text
    • http://gipoletuzemixol.iblogger.org/why_is_finlands_education_system_better.pdfIn PDF document text
    • https://seporulakokifo.weebly.com/uploads/1/3/4/5/134590723/1763de01f85e4.pdfIn PDF document text
    • http://sakuzibud.iblogger.org/how_to_lower_schwinn_bike_seat.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/895d228d-d0c0-48ff-a168-951992a59761/how_to_practice_radical_self_acceptance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb5433f1-68b6-440c-81dc-9eecea15391d/where_to_sell_law_school_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d719bf16-ac3f-4323-ad1a-fb39b4794670/pafiwirasagosovuvo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c800e51-207e-407e-b2b7-5ed525a3f5e8/why_does_my_garage_door_keep_beeping.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9edc22f5-3a0b-4cee-921b-5d84d9c827c3/kenneth_e._hagin_net_worth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eadf20c1-9e85-44b2-a699-8318f4f2ff9c/tatefisamuxar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52a7122c-c376-49d3-a615-a731cec57994/washington_dc_average_weather_in_march.pdfIn PDF document text
    • https://2080fafa-2491-4ac3-8118-a138f33bff34.filesusr.com/ugd/822ecd_07b8faea7a774006b6ef0c7cac72dbd4.pdf?index=trueIn PDF document text
    • http://jijitereni.rf.gd/10603241597.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c430446-2a7d-4beb-a7df-524b9f2e10cf/sagixagapalevowenuvojigov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/127d60e0-1a36-423e-bf8a-0cb4c6e23c30/what_does_sending_warm_wishes_mean.pdfIn PDF document text
    • https://75e6061f-eb7a-4ce8-b546-077bf96366c3.filesusr.com/ugd/2dfd19_8f31715e5f2149b390e16f613bf3d4ee.pdf?index=trueIn PDF document text
    • https://c8f6a2ed-bc8a-4fd4-b26a-19707db7c4cd.filesusr.com/ugd/1cc7e8_48a6e1cfbd244326a0f10c21ee5b8611.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/27e8b55e-a2c8-49b2-ab3f-75b08d8e7bca/what_is_taco_bells_secret_menu.pdfIn PDF document text
    • http://jodolevuvik.epizy.com/career_development_plan.pdfIn PDF document text
    • https://9ec55029-67b1-4fe0-9a5d-40fd638ac594.filesusr.com/ugd/dc5a51_a34799163940423eb1d37971b1887df6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f09176e3-3f3d-4f09-8975-e85b6cbde1cb/74561521495.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_off0000d9d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9D3 5276 bytes
SHA-256: 97e61b1b02981429c7964a314420c4dbb77ade9e613ec0217cfc6a6ec03f0ef1
font_01_sfnt_off0000ebc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC3 11092 bytes
SHA-256: cc2d00c01287b9be5c34efecb1de157b23726917e5f76d6c0fb181358f03b918