Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f7ee28e0b2d2c58…

MALICIOUS

PDF

78.1 KB Created: 2021-05-16 21:54:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a3989f113491c2ac07dafcf65854dd07 SHA-1: 10fb512531bf1ffb45a74e5309596ebe3d15e85e SHA-256: 9f7ee28e0b2d2c5845abdfc6664be16787d823e6baf39bb73abe2c73652f9fb1
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-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://jumiwimov.ru/strik?utm_term=thank+you+lord+for+your+blessing+on+me+quotes PDF link annotation
    • http://honey-love.ru/38303431295f6fbb.pdfIn PDF document text
    • http://gujomabesisiwo.iblogger.org/how_long_to_cook_a_turkey_in_an_oil_less_fryer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473041/normal_60342f1506ba2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365582/normal_6050c44365609.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452376/normal_60255e726b567.pdfIn PDF document text
    • http://24goodstore.site/what_are_some_examples_of_enduring_issueslxag0.pdfIn PDF document text
    • http://gufutaca3.xyz/a_c_a_ka_full_formn6o4e.pdfIn PDF document text
    • https://fukuperuka.weebly.com/uploads/1/3/4/8/134883813/migepof.pdfIn PDF document text
    • http://antinomi.design/safety_incident_reporting_pptnjjfi.pdfIn PDF document text
    • https://momibugu.weebly.com/uploads/1/3/4/6/134674353/kasovo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://66547991-fb4b-492c-b271-2b6457db34f0.filesusr.com/ugd/a98e70_c4042679eed94b64ba269cf8fb1e2e57.pdf?index=trueIn PDF document text
    • https://61069a5e-3c5f-4884-a3c7-8c7552058b74.filesusr.com/ugd/0789d5_344160025ecb4cb7aace4d7391226fdf.pdf?index=trueIn PDF document text
    • https://44bb6ee8-a0fe-4f72-890f-0f0a2fec05cf.filesusr.com/ugd/b65acf_7876abbe827e478d8773c76ef57ab126.pdf?index=trueIn PDF document text
    • http://mibofive.epizy.com/the_fabric_of_the_cosmos_space_time_and_the_texture_of_reality_by_brian_greene.pdfIn PDF document text
    • https://d497f082-4895-42de-a72c-038d9367c8a3.filesusr.com/ugd/8e727b_7f1db04ad09348348c2efad2f80bbd91.pdf?index=trueIn PDF document text
    • https://409b2d23-5c1d-402e-97df-26c0da9299b0.filesusr.com/ugd/2e3d42_bbc91d4d4f5d4a98b3047cbdde02f24b.pdf?index=trueIn PDF document text
    • https://1fa67a36-2e8b-44cc-a955-751d80433762.filesusr.com/ugd/d85e51_0b0898f2566c4033bbf8e60d7229f0ef.pdf?index=trueIn PDF document text
    • http://gozivedelefagi.rf.gd/bridges_math_home_connections_grade_5_answers.pdfIn PDF document text
    • http://rejemozovasekuw.rf.gd/78598432870.pdfIn PDF document text
    • https://49432a94-54bc-4d13-9d12-ea41d731e1b8.filesusr.com/ugd/a7c689_02dc601de8304763b16e1ea54ce2baaa.pdf?index=trueIn 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_off0000f34e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF34E 5700 bytes
SHA-256: 0f4d0b8ed3a94a0948a988bb4ef5dd85aeece1eb2e4f4dfd5ee810fd9b12a1c3
font_01_sfnt_off00010684.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10684 10712 bytes
SHA-256: 1b74a631e72cfc30ea3bb773b3068b1aebf3c43fb792307e5046e8a7884b3305

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