Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1d3b65397566bde…

MALICIOUS

PDF

81.0 KB Created: 2021-02-27 16:33:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: a0aa3e6819ee7dc9f542c18d7ffe3622 SHA-1: d93824fff22f036fc644ddd1b6fd9ec61ae762ed SHA-256: d1d3b65397566bde9affb014d3b5cfefa25cec46b229fffb5ff8864984822b3c
126 Risk Score

Malware Insights

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

The PDF contains embedded URLs and heuristics indicate it is a link farm on disposable hosting, with a high ML score and ClamAV detection confirming maliciousness. The document body, though heavily obfuscated, suggests a lure related to 'how to reset boat bluetooth headphones', directing users to a suspicious URL. This pattern is consistent with phishing or malware distribution via a malicious document.

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://midufefew.ru/award?keyword=how+to+reset+boat+bluetooth+headphones PDF link annotation
    • http://kakadari.iblogger.org/42763049165.pdfIn PDF document text
    • https://bugajikiwolano.weebly.com/uploads/1/3/4/4/134471946/wefofakipovafil-bumafegekujejik-rinaxaze-zawufupajemix.pdfIn PDF document text
    • https://mamufitixiru.weebly.com/uploads/1/3/4/6/134640278/3866667.pdfIn PDF document text
    • https://bigadamedoje.weebly.com/uploads/1/3/1/3/131384249/84522.pdfIn PDF document text
    • http://zorexodepa.iblogger.org/lesosipijemebolu.pdfIn PDF document text
    • http://xepelewatelaziv.getenjoyment.net/the_wahls_protocol_cooking_for_life_book.pdfIn PDF document text
    • http://xoroketogejuxe.mywebcommunity.org/23332795171.pdfIn PDF document text
    • http://vekifurusib.22web.org/74316523888.pdfIn PDF document text
    • https://jedexapotup.weebly.com/uploads/1/3/4/4/134472831/9551534.pdfIn PDF document text
    • http://gekodejevotug.medianewsonline.com/voxupovobusese.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://safilizejodi.epizy.com/zirujupexepezig.pdfIn PDF document text
    • http://ketawod.epizy.com/algebra_1_regents_jan_2018_answers_jmap.pdfIn PDF document text
    • http://gizejofak.epizy.com/wijinodulunoj.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/saaho_bang_bang_song_naa.pdfIn PDF document text
    • http://xekabotiwuker.atwebpages.com/xenamunisoz.pdfIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/tetox.pdfIn PDF document text
    • http://pubexet.rf.gd/batman_arkham_city_pc_highly_compressed.pdfIn PDF document text
    • http://vomalowo.epizy.com/jelixaruj.pdfIn PDF document text
    • http://vujuvisesakok.myartsonline.com/71876188159.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/birthday_card_template_vector.pdfIn PDF document text
    • https://s3.amazonaws.com/genedesowul/the_outsider_king_book_review.pdfIn PDF document text
    • http://bemuvubovewe.epizy.com/casas_de_madera_para_nios_planos.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_off00010182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10182 5240 bytes
SHA-256: 3e0a723abfa9a288c92f5b08990ebf950646c0fc20b3443cc75cfaa7f765df85
font_01_sfnt_off0001134f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1134F 10136 bytes
SHA-256: 4a4abbafb65e8b68f8cf92459ea621467d5f606a6250765d772e3d115762ecd9

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