Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f994f72c549a289…

MALICIOUS

PDF

84.1 KB Created: 2021-03-14 17:10:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: c402149ccd5de55a22dd397394f1eecd SHA-1: 8efcfa0f303b0a0ce4e05716242c5554723debd9 SHA-256: 9f994f72c549a289d5c51ea5c4bc804743f525964f84fb3f43a52c0b80c3479e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing attempt. It contains numerous links to external websites, with one prominent URL being https://mezovuduw.ru/wix?keyword=vistaprint+holiday+cards, suggesting a lure for users interested in holiday cards. The document body, though heavily obfuscated, contains references to 'Vistaprint holiday cards' and 'wkhtmltopdf', reinforcing the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://mezovuduw.ru/wix?keyword=vistaprint+holiday+cards PDF link annotation
    • http://6gusevshop.website/ruworu2qgv1.pdfIn PDF document text
    • http://fekowepiz.mywebcommunity.org/how_do_you_get_agile_certified.pdfIn PDF document text
    • http://nopotaz.medianewsonline.com/29966734379.pdfIn PDF document text
    • http://cocobeautybar.ca/altec_lansing_boom_jacket_2_manual03ki4.pdfIn PDF document text
    • http://gamukanemafutu.mywebcommunity.org/jack_reacher_novels_in_order_of_publishing.pdfIn PDF document text
    • https://xejotonevuxujuj.weebly.com/uploads/1/3/1/3/131379732/lavubufuvenadenog.pdfIn PDF document text
    • https://sadijamozu.weebly.com/uploads/1/3/0/8/130814559/xokokoguxufobibafox.pdfIn PDF document text
    • http://tujubafi.getenjoyment.net/tutorial_admission_form.pdfIn PDF document text
    • http://mesanezedid.mypressonline.com/32189016082.pdfIn PDF document text
    • http://powajaxib.medianewsonline.com/multiple_intelligences_gardner_book.pdfIn PDF document text
    • http://kudukudimox.sportsontheweb.net/astronomy_today_6th_edition.pdfIn PDF document text
    • http://xojuxelase.medianewsonline.com/ppp_lesson_plan_example_present_continuous.pdfIn PDF document text
    • http://giwudogor.scienceontheweb.net/17312488858.pdfIn PDF document text
    • https://zabaparadasikid.weebly.com/uploads/1/3/4/3/134317604/nusodat_zekomogimapuxoj_tomigarexupu.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/56c96521-7d7a-4710-b755-cc2ff5e3cf6a/2361763333.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4bde552-e96a-4547-875c-a3a1c8c393ea/word_order_in_english_sentences_exercises.pdfIn PDF document text
    • http://bitines.myartsonline.com/how_do_you_turn_a_ratio_to_a_fraction.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d9a50c4-c5e5-4cc2-815c-b76fe7801543/wulinejikawosat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b188efcf-5c73-4517-9e0b-f1336187549d/wudetopesikefefemoguzoz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2d08473-18e2-4b89-9231-1c39cb49db6f/robert_e_howards_conan_roleplaying_game.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE10 4900 bytes
SHA-256: 9640e270125a9656ce978b0b3dd6bc2c5d1313b5732e4994db970f6bf12a8535
font_01_sfnt_off00010ea2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA2 11436 bytes
SHA-256: 3c0df58985368f8c2914aca1a51d35b55d9e72c5adffe16d449e36542154b7f6
font_02_sfnt_off00013522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13522 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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