Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcf95d01d12a0495…

MALICIOUS

PDF

67.4 KB Created: 2021-03-12 05:18:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 0974591c1b640e317b6d8e1afd351232 SHA-1: 6c5d848bf0c4dc68a90cdffbe0ffd476dbbf0335 SHA-256: bcf95d01d12a0495e97ae62526bd35bba83d5052982503f0b8f25189a9e33493
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, with several pointing to known malicious redirector infrastructure or potentially malicious domains. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' strongly indicate a malicious intent to redirect users to harmful sites. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to facilitate phishing or malware distribution.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://yafferge.ru/wix?keyword=bob+the+robber+unblocked+games+77 In PDF document text
    • http://souve.me/sunasobtcrq.pdfIn PDF document text
    • http://ujjjrrrrr.space/segunda_guerra_mundial_cuadro_sinopticoe7nu6.pdfIn PDF document text
    • http://naturfresh.fun/entrepreneurship_notes_class_11s7tlv.pdfIn PDF document text
    • http://towonededuv.medianewsonline.com/tell_me_five_things_about_yourself.pdfIn PDF document text
    • http://bewizasosu.sportsontheweb.net/95689193765.pdfIn PDF document text
    • http://dhl-order.info/6847531294h7nmv.pdfIn PDF document text
    • https://vibejatixulaxa.weebly.com/uploads/1/3/4/1/134131444/372735.pdfIn PDF document text
    • http://devlp.club/casio_mens_stainless_steel_world_time_illuminator_watchiuhnm.pdfIn PDF document text
    • https://duxubekuzew.weebly.com/uploads/1/3/4/5/134506612/6d0a9800c0.pdfIn PDF document text
    • http://lilubaxubaxulu.sportsontheweb.net/what_alexa_commands_work_with_samsung_tv.pdfIn PDF document text
    • http://sawemawe.mywebcommunity.org/beowulf_online_subtitrat_2016.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/jubiferekaka/tikonetexal.pdfIn PDF document text
    • https://s3.amazonaws.com/wejuvono/83964313065.pdfIn PDF document text
    • https://s3.amazonaws.com/xapota/53405892329.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e76cf68-0538-40d7-869e-f2c55d6f07b1/the_art_of_manipulation_audiobook.pdfIn PDF document text
    • http://zusaxadixuxot.myartsonline.com/ncdot_construction_entrance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a9d5a78-a9c7-4262-be93-a25137c2f471/labujanalizulanavoxob.pdfIn PDF document text
    • https://s3.amazonaws.com/sazomo/ascending_aorta_dilation_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a015580-5dd2-4776-8cbb-be97d8b08381/how_to_put_together_a_large_wire_dog_crate.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/free_email_invitation_templates_for_outlook.pdfIn PDF document text
    • http://jofikuv.atwebpages.com/how_do_i_tell_what_year_my_briggs_and_stratton_engine_is.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba00e330-16e7-4ab8-86b8-cc11bdd036ea/eats_shoots_and_leaves_joke_explanation.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_off0000cae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAE0 5688 bytes
SHA-256: c55e1b9e418194f05d09b6def38f41c2307bfe2e8ee30decc519b1d999cf319a
font_01_sfnt_off0000de0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE0F 10104 bytes
SHA-256: d9377954b2161b90e92169fc0954574e9ca77e5d932125bb2208125d6db226d7

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