Malicious PDF — malware analysis report

Static analysis result for SHA-256 61396cef6d45bf2a…

MALICIOUS

PDF

76.3 KB Created: 2021-03-01 05:46:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: fd8e6ce7ae6d810f7ba215457fe8a1da SHA-1: b66e6177158ecbae16cfc2fe550275c512faeeb8 SHA-256: 61396cef6d45bf2a3f3f5f01c16ebce0218393685e627beced921fe99b127454
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a common phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xezojetit.ru/123?utm_term=a+time+to+kill+sequel PDF link annotation
    • http://doluridibulif.iblogger.org/biaggi_s_farfalle_alfredo_nutrition_information.pdfIn PDF document text
    • http://govnosiakxws.online/casque_shoei_neotec_2_splicer_tc-5qxzdx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377102/normal_6011045a7e520.pdfIn PDF document text
    • http://armlur.space/how_to_put_chain_back_on_poulan_chainsawxm6lv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376858/normal_5fe6dddb8ae75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472188/normal_6033ec415c835.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426270/normal_600baa81b8153.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386081/normal_5fd1e0930e011.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383922/normal_5fe6955189f71.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387219/normal_5ffddeff8be8d.pdfIn PDF document text
    • http://pro-komp-master.website/bebuxivubuwirigimatu254yr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491671/normal_602505efd2b90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416790/normal_60146ee121f09.pdfIn PDF document text
    • http://jafujofefi.iblogger.org/simple_past_regular_verbs_exercises_printable.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448345/normal_5ff21f9aafe16.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sowawobajomo.rf.gd/credit_inquiry_removal_letter_template.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_off0000efc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC4 4704 bytes
SHA-256: a83f5ebb392047c1912f34388470c29742613233d6e84d8d07903593fdf7dbb7
font_01_sfnt_off0000ffbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFBF 10920 bytes
SHA-256: 71b214528c2f175e82ba61d8f51e4c93f1fab7f86808e71c641c5b2675af16bc

Open this report in the interactive analyzer, or submit your own file for analysis.