Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0cd9b11fe547f14…

MALICIOUS

PDF

74.4 KB Created: 2021-03-20 19:11:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 496c1eb632c5b0c0640208fbde375ea6 SHA-1: 1175a2b44fa10d6f108f6ed3516d61096c0462ec SHA-256: d0cd9b11fe547f1428649610b2a83f02ad331073c1dc2a81b799bb910492458b
126 Risk Score

Malware Insights

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

The PDF contains numerous external URLs, many hosted on disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

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://ponafet.ru/award?keyword=publication+of+smiles+rearrangement+pdf PDF link annotation
    • http://shoppermarket.online/cuanto_cuesta_un_metro_cubico_de_arenabi22n.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425255/normal_60009a71ea12c.pdfIn PDF document text
    • http://crubr.space/50209473877fkrpc.pdfIn PDF document text
    • http://popularchoice.space/2570155066lgpm3.pdfIn PDF document text
    • http://milktree.store/how_to_make_saltwater_bottom_fishing_rigslphbf.pdfIn PDF document text
    • https://namowabe.weebly.com/uploads/1/3/4/0/134000139/4116728.pdfIn PDF document text
    • http://mazejofeg.mygamesonline.org/59201405634.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369187/normal_5fe553c199b8c.pdfIn PDF document text
    • http://vorgazme.com/memoirs_of_an_addicted_brain8qa13.pdfIn PDF document text
    • https://pujezifug.weebly.com/uploads/1/3/0/7/130738771/favojixuvat-gedaluduwu-xojijikimodisov.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444370/normal_5ff453d31b070.pdfIn PDF document text
    • http://welitizenowem.mywebcommunity.org/29172925033.pdfIn PDF document text
    • https://vawilateg.weebly.com/uploads/1/3/4/6/134697686/d35c20e951d7.pdfIn PDF document text
    • http://zovofuti.mygamesonline.org/biblical_affirmations_prosperity.pdfIn PDF document text
    • http://info-pages.ru/448652957803eani.pdfIn PDF document text
    • https://rulorakaduf.weebly.com/uploads/1/3/4/4/134480735/zokopolipuwimigapot.pdfIn PDF document text
    • http://omshop.space/56078707186pchjj.pdfIn PDF document text
    • http://figejewumoposes.getenjoyment.net/32408709580.pdfIn PDF document text
    • http://1xbet-regi.site/process_flow_chart_template_excel6m3jq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500208/normal_5fff132c2dbab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sutexuvidag.myartsonline.com/b._ed_entrance_syllabus.pdfIn PDF document text
    • http://tafiwepamubov.atwebpages.com/computer_operator_and_programming_assistant_books_in_hindi.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_off0000e3fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3FA 5616 bytes
SHA-256: a6c52312f9c7f4ac1fba59d4069149f42885edbdec45817e509afe712b5ebf3d
font_01_sfnt_off0000f6f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F8 11064 bytes
SHA-256: 2d231e08a4c6210302cb7528adce913edeb28b99522ff3518153204bef12a4f3

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