Malicious PDF — malware analysis report

Static analysis result for SHA-256 5029b4824634f67d…

MALICIOUS

PDF

81.4 KB Created: 2021-03-29 08:58:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 7992e86e7ac86236a45b68cd66be4e60 SHA-1: dec983be802ac5288d084eb2b4fcdf8a55d1219f SHA-256: 5029b4824634f67d55a35464d8e7ee60668fa784d0bfb09b5032a1dac113ce64
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable domains, indicating a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to distribute further malware or phishing content. While no scripts were explicitly extracted, the PDF structure and numerous external URLs are indicative of a malicious document, potentially used as a lure in a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://botokaw.ru/wix?keyword=demon+eye+banner+terraria PDF link annotation
    • http://vehicleinsusa.com/daily_life_of_a_serf_in_medieval_europe2yu5f.pdfIn PDF document text
    • http://mattelipsticks.site/darlinghurst_school_ofsted_report_20168if6e.pdfIn PDF document text
    • https://fulodovujigiw.weebly.com/uploads/1/3/4/0/134016909/podufesikexafedur.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4530868/normal_5fddb48329dba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425726/normal_5ffb1a0a4ac81.pdfIn PDF document text
    • https://ritidajadufe.weebly.com/uploads/1/3/4/6/134622671/sizemopitatejup.pdfIn PDF document text
    • https://xewulowew.weebly.com/uploads/1/3/4/7/134757629/zagovamonikujare.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471082/normal_60113756bddff.pdfIn PDF document text
    • https://gareketekefebon.weebly.com/uploads/1/3/4/6/134695024/6b22978a23dc63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405953/normal_6054bc006feab.pdfIn PDF document text
    • http://meetcabinets.xyz/where_is_the_reset_button_on_a_sony_tvouhfv.pdfIn PDF document text
    • http://disclosures.space/35674359250uxbpx.pdfIn PDF document text
    • https://dekizojumuleje.weebly.com/uploads/1/3/4/1/134133140/nipowadubu_gejubo_piwuxik.pdfIn PDF document text
    • https://mizemajawoxulu.weebly.com/uploads/1/3/1/4/131437858/e3e0b8.pdfIn PDF document text
    • http://cpatrump.com/61124045601vc9hz.pdfIn PDF document text
    • https://famonusowofem.weebly.com/uploads/1/3/4/3/134349488/4ed45574ba5.pdfIn PDF document text
    • https://mowofagafuvu.weebly.com/uploads/1/3/4/5/134594922/zavebiboveni.pdfIn PDF document text
    • https://doleroxewaforud.weebly.com/uploads/1/3/4/3/134322791/97b9b45.pdfIn PDF document text
    • https://nakoliveb.weebly.com/uploads/1/3/4/5/134503524/4455144.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375514/normal_5ffc7a01de6e9.pdfIn PDF document text
    • https://kewivuzakokefi.weebly.com/uploads/1/3/0/7/130775129/nevabimumadufun.pdfIn PDF document text
    • https://nuvuxupu.weebly.com/uploads/1/3/4/5/134507381/6d6ad514c9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0296ecfc-28ae-4fa5-925c-67a25994cace.filesusr.com/ugd/c88839_c1ae1cdd121a44b68d2ad6ed515158f4.pdf?index=trueIn PDF document text
    • https://11f44e1d-c86f-4be6-baa1-90970e7c24f5.filesusr.com/ugd/a298ce_a14b6c9e24b745958c566cab82bbd08a.pdf?index=trueIn PDF document text
    • https://507d1b22-ea03-4061-a262-f79425337ca2.filesusr.com/ugd/a374b9_72688578ec024ab9a38a84431bf13eee.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_off00010083.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10083 4860 bytes
SHA-256: d4f64d33eab380571b37293bb976c8a2f3b633a44074e8e664736ea011fedda7
font_01_sfnt_off00011103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11103 10812 bytes
SHA-256: e234a4e0c240258ff5905f6f99b21eb309b9cbdb6ac8c1bcbf11faba72d53ccc