Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e06b60614e87e8b…

MALICIOUS

PDF

75.6 KB Created: 2021-03-27 11:37:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 692729abf8bb2df89c23467ca960d84b SHA-1: 9ac837e66296b01f07e1b74dc0abd7a6e5afb237 SHA-256: 5e06b60614e87e8b7c511354260f6d504013d277f1a53234a0c0b7c078ac8112
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/award?keyword=alcoholism+project+pdf PDF link annotation
    • https://kotasixunepa.weebly.com/uploads/1/3/0/7/130776076/4877984.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406482/normal_605993ef7f639.pdfIn PDF document text
    • http://sugameloxufe.mywebcommunity.org/jiboforazusofame.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502819/normal_605cee552a119.pdfIn PDF document text
    • http://zekifafeter.scienceontheweb.net/midagusotazefom.pdfIn PDF document text
    • https://patelevikukel.weebly.com/uploads/1/3/4/6/134665122/018bb.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/dfe43005-a912-4941-be39-a7e931698e6c/how_much_does_a_juvenile_lawyer_cost.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7f2d663-a61c-42df-a6c4-d98e2df42996/thermador_service_near_me.pdfIn PDF document text
    • https://86b7bb9a-6a0b-496c-a062-e8aa60c365d0.filesusr.com/ugd/dcf311_c6c46a2bf6c745b7b4dc5ffe32926165.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/gasojak.pdfIn PDF document text
    • https://a86a6b26-b473-4b55-b9aa-7628a2bff077.filesusr.com/ugd/4f270c_758576696ef64a2fb454364c12bcf730.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d2d3fe2-9c0a-4a9e-9cea-8a9eefcbc399/joduparezirululalusone.pdfIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/kohler_bathtub_faucet_installation_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a789857a-98e1-4c36-9ab5-6f3bce6a2c38/how_to_run_a_lathe_56th_edition.pdfIn PDF document text
    • https://c2bc7a71-cb21-434c-84f6-8d2fc09ed56d.filesusr.com/ugd/03ae60_6470eaf052e6482f9b2a13b4304788cd.pdf?index=trueIn PDF document text
    • http://xufoziminep.onlinewebshop.net/calendar_ortodox_mai_2020.pdfIn PDF document text
    • https://2ea3657d-1c4c-40dd-8491-58aeeb8dc933.filesusr.com/ugd/18a85a_33af301be81f4b41b53d2c79f4f608ec.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC2F 5252 bytes
SHA-256: 273ba6661bd018bb4a040421f409ac1e5d263f8b29d96a70063258090525d9ef
font_01_sfnt_off0000fde8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE8 10472 bytes
SHA-256: 8178685e91c5b74f6e6d6ced0de031896671aaf125751135d81b38dadb0b014b

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