Malicious PDF — malware analysis report

Static analysis result for SHA-256 45ceb92c1e84c4fb…

MALICIOUS

PDF

75.1 KB Created: 2021-05-14 03:47:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 1b69b442cc5638f8def069086c5a57ed SHA-1: 9dd2174ac0852cf4a59bb7ef86c75a0b6e9b0fb0 SHA-256: 45ceb92c1e84c4fb70162add78f5ea86a49479eb8918af7aaae211741d658394
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file is detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document body, though heavily obfuscated, contains references to cleaning a Keurig water reservoir, a common lure for phishing or malware. The numerous embedded URLs, many hosted on disposable domains, strongly suggest a link farm designed to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://dafemum.ru/strik?utm_term=how+to+clean+keurig+2.0+water+reservoir PDF link annotation
    • http://suzofovolavuk.scienceontheweb.net/argonauts_book.pdfIn PDF document text
    • http://supermagazforsale1.xyz/grow_bible_freew2xd5.pdfIn PDF document text
    • http://leqqurint.online/sparknotes_origin_of_species_chapter_6mc2v3.pdfIn PDF document text
    • http://luxuwum.mypressonline.com/validity_types.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378836/normal_5fe930c1c8ab1.pdfIn PDF document text
    • http://dalidusiz.mywebcommunity.org/guwaz.pdfIn PDF document text
    • http://de-bewertung-id-q2e5t23.top/96506742800glefz.pdfIn PDF document text
    • http://gatowixipeba.mywebcommunity.org/zegipilokikiv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369508/normal_600a266a6c20c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366033/normal_5fd6d2ea37f49.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • http://sumapewub.getenjoyment.net/all_assets_and_liabilities.pdfIn PDF document text
    • http://lukanovetefitef.22web.org/10822383870.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480148/normal_601ed552eb8c0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493569/normal_5fd8403b6e524.pdfIn PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sugosubexez/woxepozurafobizovusepasum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61c35c0a-bb6a-4212-8805-c0d24e4b4c63/2062399167.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/juliette_gordon_low_coloring_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/skype_version_7._32.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/200f63a8-6a3a-4d85-9eca-cf06b61a3aa6/how_much_charcoal_to_use_weber_smokey_mountain.pdfIn PDF document text
    • http://rokidibamufoduv.epizy.com/bonus_forms_format.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE550 5452 bytes
SHA-256: dd8428058f0dec56bf7bea95b4c5a4b56cdbc72ced12488db6bc482c8f34047a
font_01_sfnt_off0000f808.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF808 10920 bytes
SHA-256: 25ca244dd96a4f7130041822ec2a9bbed8e011b42b0c1a7e555447f369528dc9

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