Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c76e41216a2e0a2…

MALICIOUS

PDF

135.3 KB Created: 2021-05-04 06:09:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 863a40522063983d46cf99a74d4d22a2 SHA-1: 8a14eb056782c4f60449809e159ac77ad50f4433 SHA-256: 1c76e41216a2e0a23db90baae4160d9cfb530d76a810bb49817b7607b63077c2
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 0.9985

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://soxebez.ru/strik?utm_term=lonely+planet+mexico+pdf+free+download PDF link annotation
    • http://kevebofuru.medianewsonline.com/pdf_accessibility_checker_pac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406775/normal_5fc7ebe82673a.pdfIn PDF document text
    • http://bopolubolef.mywebcommunity.org/67738423789.pdfIn PDF document text
    • http://zesegalos.scienceontheweb.net/gagodenogam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408335/normal_5fe8efcf8626e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470524/normal_60594e9bb37a0.pdfIn PDF document text
    • http://lerimofo.mywebcommunity.org/new_encyclopedia_of_modern_bodybuilding_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387931/normal_60603be67a18a.pdfIn PDF document text
    • http://xonufokavowitiz.iblogger.org/goat_farming_books_in_tamil.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382960/normal_6003a7d62752f.pdfIn PDF document text
    • http://bugosegu.scienceontheweb.net/easy_piano_songs_with_letters.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ce722411-b424-48ee-ac00-b4ed8818edd9.filesusr.com/ugd/bff0de_ffc8dfe7797a412bafd2b2d5973c26c6.pdf?index=trueIn PDF document text
    • https://dc6b22d1-fd3c-476a-b8f1-b0505981f591.filesusr.com/ugd/ab5adf_07654f3ce5894e0083efdc1650364e3c.pdf?index=trueIn PDF document text
    • https://6c71f620-b6e5-46cc-9e58-526c5f0a7a41.filesusr.com/ugd/1c90dc_2f0d8e455225411286bf7df8381ed91d.pdf?index=trueIn PDF document text
    • http://piwolimosopobu.myartsonline.com/dollhouse_fashion_australia.pdfIn PDF document text
    • http://pekowob.onlinewebshop.net/julumijesaxo.pdfIn PDF document text
    • http://pagilupoge.rf.gd/academic_ielts_reading_practice.pdfIn PDF document text
    • http://mavavopem.rf.gd/wajaludivija.pdfIn PDF document text
    • https://c72a6d71-2fad-4f5a-8b7a-a7c165485bce.filesusr.com/ugd/a4966f_38496db19ee14ce787c54a465eb29e14.pdf?index=trueIn PDF document text
    • http://xutenujute.myartsonline.com/whistle_blowing_policy_in_nigeria.pdfIn PDF document text
    • http://zopegekole.rf.gd/formation_chauffagiste_toulouse.pdfIn PDF document text
    • http://peruroz.onlinewebshop.net/the_great_ideas_program.pdfIn PDF document text
    • http://dopelafoxumamew.rf.gd/87992358142.pdfIn PDF document text
    • https://a52dd608-e7dd-4d50-8005-e0fd7a3896b4.filesusr.com/ugd/43d2fc_091ed5e9d1b8461882482825d3c4ac6e.pdf?index=trueIn PDF document text
    • http://pizenusogusu.atwebpages.com/51453545786.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_off0001d2aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D2AA 5324 bytes
SHA-256: a83feec971dddcc18ff0c6f26e2b9e13ee859f56e723e66a6bae732bcefb38de
font_01_sfnt_off0001e4d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E4D4 12784 bytes
SHA-256: 0fb3409197c5e9ded1991131b60aff1ce31a421845b639be73fa4c91c4630c9a

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