Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1fc15945fce0e37…

MALICIOUS

PDF

77.7 KB Created: 2021-03-24 12:13:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 325d671b1b2111307b12c04b40c79721 SHA-1: e32ed92aa047c3e91945d2d324db77e6ffc3228d SHA-256: e1fc15945fce0e37acfd4f1f5c2e1ebed914e9b63ce2294bfd4485b06a3df089
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are likely part of a phishing or scam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to a 'cut flower garden book pdf', which is likely a pretext to drive traffic to the malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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=cut+flower+garden+book+pdf
    • http://idealica-ufficiale.site/groupme_notifications_not_working_2020y573t.pdf
    • https://cdn.sqhk.co/pagifizipafo/igjatie/train_conductor_world_hack_version.pdf
    • http://memaberenux.scienceontheweb.net/array_function_in_php_with_example.pdf
    • http://neip-forum.fun/doloxunirazobpg9q4.pdf
    • http://xirapanagix.getenjoyment.net/horarios_cercanias_zaragoza.pdf
    • https://cdn-cms.f-static.net/uploads/4473375/normal_601cfbf22e08e.pdf
    • https://poxixarusel.weebly.com/uploads/1/3/4/1/134131789/11838b7ae84c6.pdf
    • https://cdn.sqhk.co/keridola/JjfZHif/kalinid.pdf
    • http://zexaribamemavi.sportsontheweb.net/how_much_should_an_ordained_minister_charge_for_a_wedding.pdf
    • https://cdn-cms.f-static.net/uploads/4403818/normal_600bcf59014ae.pdf
    • http://wegoradubi.sportsontheweb.net/applications_of_computer_science.pdf
    • http://mumolazesinidix.getenjoyment.net/bitixomudoluzizazefanugu.pdf
    • https://cdn.sqhk.co/wizokawoxo/agjDzmR/venmo_account_frozen_asking_for_id.pdf
    • http://winovigamaj.mygamesonline.org/uglys_electrical_references_2020_edition_6th_edition.pdf
    • https://cdn.sqhk.co/vodadavubex/igdEb5P/wozis.pdf
    • https://cdn-cms.f-static.net/uploads/4367277/normal_601b1847e8fb7.pdf
    • https://cdn.sqhk.co/noperizapewo/idyoaPc/should_you_answer_unknown_phone_numbers.pdf
    • https://vuvararuwojagis.weebly.com/uploads/1/3/4/6/134608035/rixamolox_pakiliwakiga.pdf
    • http://littlenat.space/pinotobakupekakodsusl5.pdf
    • http://rowowesofazov.medianewsonline.com/27737057733.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://netawuwimirixor.onlinewebshop.net/newujidenij.pdf
    • http://rawegutidum.onlinewebshop.net/97400784332.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0d8.bin
7536568fdb1847009a7551b57457f7e1457be5179bca01e800979cc8a36cd3cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D8 5232 bytes
font_01_sfnt_off000102c3.bin
3e519c16c2093b00033a61ccef5799064fc41dd0fd9e3a4f85e5d77a518ccb72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102C3 11476 bytes

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