Malicious PDF — malware analysis report

Static analysis result for SHA-256 00bd4a97728749b1…

MALICIOUS

PDF

76.7 KB Created: 2021-04-09 10:09:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f4afdb9d147822d4141ef1786e35ee36 SHA-1: dcb752ba9e85f312a57de0bc49422b51e1b8abc5 SHA-256: 00bd4a97728749b1ea7b2cf4a66dd4a926962f533e7ab0baa6ede31be092ef47
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9991

Heuristics 5

  • 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 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://ponafet.ru/strik?utm_term=recaro+performance+sport+car+seat+manual PDF link annotation
    • http://lnstagramservicecopyrights.com/42785757040f6kov.pdfIn PDF document text
    • http://pemotutafid.mywebcommunity.org/8420713395.pdfIn PDF document text
    • http://nubolutlion.xyz/tarutasefutixyfii.pdfIn PDF document text
    • http://foxilajat.sportsontheweb.net/non_biodegradable_plastic.pdfIn PDF document text
    • https://cdn.sqhk.co/kufalavoxig/jdghiij/jowas.pdfIn PDF document text
    • http://gbo.guru/barfu_am_klavier_noten2998a.pdfIn PDF document text
    • http://winoorama.site/running_drills_techniquensn7q.pdfIn PDF document text
    • http://stankoff.org/jaxunuxuwenebmlfih.pdfIn PDF document text
    • https://cdn.sqhk.co/ridijafugemi/0GidYyk/34541770285.pdfIn PDF document text
    • https://cdn.sqhk.co/fewukise/TBpcqd4/tumblr_app_search_not_working.pdfIn PDF document text
    • http://lnstagramservicecopyrights.com/what_is_the_second_rarest_pet_in_adopt_me_2020yk8gs.pdfIn PDF document text
    • http://tokio-2020.fun/wosomop93f81.pdfIn PDF document text
    • http://avlto.best/gugubetenitufaga9jltp.pdfIn PDF document text
    • http://rollernefritmassage.xyz/ti_84_plus_online_freee52i1.pdfIn PDF document text
    • http://onlinetiser.website/anatomie_de_l_articulation_du_coude5tlyq.pdfIn PDF document text
    • https://cdn.sqhk.co/degamuwubela/b0ijjiZ/75602724290.pdfIn PDF document text
    • http://businesshelpservice.com/27805212833thfpc.pdfIn PDF document text
    • http://hookup154.fun/satyanarayana_pooja06u07.pdfIn PDF document text
    • http://alteramaks.world/sikirilubuwopapijajosuj2tb9e.pdfIn PDF document text
    • https://cdn.sqhk.co/jaxabofapuw/7TQjdhd/movie_matinees_today_near_me.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ed7c5604-ec0f-4ae6-9d22-6d534b57d154.filesusr.com/ugd/1d5a3f_efe91cfb8e304d32b4746b650a8b48b1.pdf?index=trueIn PDF document text
    • https://a3cd4400-5fdc-4e6a-bda8-88556a2d4d1f.filesusr.com/ugd/2f7489_2069fae2fa344ee08e3bc55c092ca13d.pdf?index=trueIn PDF document text
    • https://03386fec-e341-46be-bf9f-2f2bd19f9bfe.filesusr.com/ugd/bf57b5_e53eb9f29d08478cb830836953f7a7fe.pdf?index=trueIn PDF document text
    • https://9d349da1-218b-4b59-9e37-2a90cab56d40.filesusr.com/ugd/de9003_24041f049ac2488fafa41a0e8c157ea7.pdf?index=trueIn PDF document text
    • https://59cf682b-6680-4a08-8b8d-0472bab64ef7.filesusr.com/ugd/d7d6cd_b4c4de80abf54c37b200a95852ef68ba.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_off0000ecf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF8 5168 bytes
SHA-256: 1109c067b0659a171a7ede1977ffd72137b30f86f4a14c7db994cf36e059eaa2
font_01_sfnt_off0000fe7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE7F 11464 bytes
SHA-256: eb417a90cfffe56497ac0ee681c00adfcc4b944918d4e346334c0b580b06cf16

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