Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cd5e0926d553fad…

MALICIOUS

PDF

69.0 KB Created: 2021-03-22 20:00:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 91a1d17fa5cb6923afd945b28847b018 SHA-1: 9a00602cbf22b51f46a8c58d1e80aa092f0850d1 SHA-256: 8cd5e0926d553fad572f9ed0d6faf3c8b7ad540d79342c0451e7edf94f58ddf3
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

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://bologen.ru/wix?keyword=rebel+flag+work+boots PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4409827/normal_5ff7cc7ebc2bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388046/normal_603475e946775.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454163/normal_5ff65c1bf331a.pdfIn PDF document text
    • https://xexemisekugo.weebly.com/uploads/1/3/4/6/134679242/gikugeve.pdfIn PDF document text
    • https://cdn.sqhk.co/mozopojugode/igjahie/dufumurotexodopuma.pdfIn PDF document text
    • http://wurilozi.scienceontheweb.net/enfermedad_por_picadura_de_garrapata.pdfIn PDF document text
    • http://kotudekudoges.getenjoyment.net/accidentes_de_transito_en_costa_rica.pdfIn PDF document text
    • https://rimofunoduw.weebly.com/uploads/1/3/4/5/134525219/4063284.pdfIn PDF document text
    • https://cdn.sqhk.co/mewuwemiromi/SONhjk7/24947553984.pdfIn PDF document text
    • https://redulexaxoxega.weebly.com/uploads/1/3/0/8/130874010/nutanokodiso-sazarek-gimitopak-gezaloboz.pdfIn PDF document text
    • http://pivojowemetobiv.mywebcommunity.org/cmo_ests_de_donde_eres.pdfIn PDF document text
    • http://tokiridevifo.medianewsonline.com/60429497327.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365541/normal_604efac1c7bb7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473031/normal_600bdfa3b497c.pdfIn PDF document text
    • https://rogipusuwegurak.weebly.com/uploads/1/3/0/8/130813654/844306.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/b28678dc-f14d-4a81-81e4-1445181217dc/lesutugexefu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a054bce-9f83-4c4a-bd7e-866452f55595/do_infrared_heaters_save_on_your_electric_bill.pdfIn PDF document text
    • http://xomapagovujux.atwebpages.com/basic_linux_commands_tutorial_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6df63a3-a284-4dc4-b567-0725f898d6df/family_feud_game_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57b28fa5-e48c-437b-bfcd-38259b510746/34938323529.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c2d057a-8aac-4e98-9a9c-da34bbb10a6f/metodologia_dela_investigacion_libro_bachillerato.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_off0000d0de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0DE 5236 bytes
SHA-256: 63d0bf87cb6b5bc5b8f0c28ccc9acc3496c1c36b3d8574acaeec37c39e287d10
font_01_sfnt_off0000e2d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D8 10612 bytes
SHA-256: cf4bf60c8f0ff1b5af288df1c23c66aac172e5630feee5bca1b684ec429d1d60

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