Malicious PDF — malware analysis report

Static analysis result for SHA-256 d427375348f79473…

MALICIOUS

PDF

69.7 KB Created: 2021-04-16 00:11:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 248d91dd37c21094b8c58223736d2de5 SHA-1: 8cad81128b5f1b32e7a1f83638145f5930c307c1 SHA-256: d427375348f7947317516c718ff613b5b5317277afe7990e3488228b71509b41
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 0.9998

Heuristics 5

  • 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 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://golowaki.ru/strik?utm_term=apc+back-ups+xs+1500+user+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403804/normal_60543e24aaff7.pdfIn PDF document text
    • https://lofokuvowuvi.weebly.com/uploads/1/3/4/3/134362742/neratozoke.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368989/normal_605a17f150bbf.pdfIn PDF document text
    • http://sozimaxetupow.mywebcommunity.org/majugutemulavamomidu.pdfIn PDF document text
    • https://jabenawonidibe.weebly.com/uploads/1/3/5/3/135385032/likenurizinu_wusobarebalezol_zugafu_tepulozubabu.pdfIn PDF document text
    • https://rovepegolotiru.weebly.com/uploads/1/3/4/3/134319415/janux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448980/normal_604a80666a7d1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443815/normal_6004cc6c58a1b.pdfIn PDF document text
    • https://vematonejos.weebly.com/uploads/1/3/1/3/131383464/39f9af4c5b.pdfIn PDF document text
    • https://rusokupos.weebly.com/uploads/1/3/4/4/134468665/lalexa_guvabimurezuz_gakeligano_gudevejikobu.pdfIn PDF document text
    • http://lomigakorak.getenjoyment.net/aleister_crowley_biography.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492286/normal_6045f4bd276ad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/ee347e01-a3c1-4c75-be66-7b2f21c27a29/free_printable_tarot_cards_with_meanings.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fc2973f-447d-4128-883d-138962059bc4/pivuposesizirelagutovu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be9e8dea-b9db-4669-ad07-d34ccc53d433/adidas_employee_store_pass_for_sale.pdfIn PDF document text
    • http://rowesupigoz.epizy.com/pasufaluvufo.pdfIn PDF document text
    • http://lowelomavojezi.myartsonline.com/antichrista_amelie_nothomb.pdfIn PDF document text
    • http://zatorir.epizy.com/bjt_amplifier_design.pdfIn PDF document text
    • http://kewetevidelumuz.epizy.com/11534592132.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c5f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5F6 5336 bytes
SHA-256: bff18ba5bdcd8158efdf490ed7473e74d92b14f1b07cdce334c36175463f4809
font_01_sfnt_off0000d802.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD802 10436 bytes
SHA-256: 38d24ebf155134a1751aa8f4708bf3b5e467f9f86a1c7eb45a64b92db1675216
font_02_sfnt_off0000fb9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB9C 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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