Malicious PDF — malware analysis report

Static analysis result for SHA-256 44317b294538bb2b…

MALICIOUS

PDF

77.6 KB Created: 2021-05-14 11:00:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 66fba48f2ca008a5fc2565a2b831e5ce SHA-1: eb4295b4e01e0f26d9ddc8162a64c122e4b05a8c SHA-256: 44317b294538bb2b9b778f21e446ac013f536cd208f3692fed4d0e60cc7144f2
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to PDF files hosted on various domains, suggesting a link farm or redirection mechanism. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs are the primary indicators of compromise, directing users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://pelibifir.ru/strik?utm_term=indian+instant+pot+cooking+book+pdf
    • http://naxajogilelog.medianewsonline.com/godemefojoxewupilir.pdf
    • https://lopiranurepo.weebly.com/uploads/1/3/4/7/134735856/3b95463170.pdf
    • https://cdn-cms.f-static.net/uploads/4390385/normal_606090862f132.pdf
    • https://wurilulisewanid.weebly.com/uploads/1/3/4/7/134728532/rufuwavivur_rimotefajazeve.pdf
    • https://foxujutuz.weebly.com/uploads/1/3/4/3/134348357/7972241.pdf
    • https://bovaxomasomi.weebly.com/uploads/1/3/1/4/131437143/83be528aab.pdf
    • https://wisapemewe.weebly.com/uploads/1/3/4/7/134713478/6481789.pdf
    • https://static.s123-cdn-static.com/uploads/4421613/normal_600111432b8c5.pdf
    • https://cdn-cms.f-static.net/uploads/4369932/normal_6042b6e7bc511.pdf
    • https://static.s123-cdn-static.com/uploads/4445532/normal_5fc9a14f6de0a.pdf
    • https://liketoxisok.weebly.com/uploads/1/3/0/7/130739237/811677.pdf
    • https://ganuwikudafo.weebly.com/uploads/1/3/0/7/130775291/tened_buwemafejuni_vevaso_fofogilipede.pdf
    • https://zefugomifavo.weebly.com/uploads/1/3/6/0/136087281/kijoboduvirowodigeli.pdf
    • http://rotixumuzu.22web.org/67637428806.pdf
    • https://cdn-cms.f-static.net/uploads/4528959/normal_602671c0df0b2.pdf
    • http://rexifiru.iblogger.org/agonistas_alfa_2_adrenergicos.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bawujirilo.epizy.com/best_dolls_images.pdf
    • https://s3.amazonaws.com/boxujetanonikuv/netflix_serie_en_mb.pdf
    • http://fazegujopazoj.atwebpages.com/80931147485.pdf
    • http://dojidusajotat.epizy.com/fiddler_on_the_roof_characters_audition_songs.pdf
    • https://s3.amazonaws.com/lanubili/90009395109.pdf
    • https://s3.amazonaws.com/pobixedele/9661561556.pdf
    • https://s3.amazonaws.com/tixedujegibex/carport_building_plans.pdf
    • http://sutexuvidag.myartsonline.com/83002835337.pdf
    • https://s3.amazonaws.com/wazagidonux/vuregut.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f13e.bin
583d5e155c4a052c1717588c272885b5899af82eb64d9bdea8169cad51d65e74		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF13E 5336 bytes
font_01_sfnt_off0001037d.bin
f47234dbcf4e3c40a8c5ed297a5612741c001c0ed60a68e5fb5e78971cae3baf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1037D 11204 bytes

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