Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddebe2e84e14148e…

MALICIOUS

PDF

63.5 KB Created: 2021-01-23 19:57:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: c91a7358fe17dbfc4dac3724460bb6ca SHA-1: 45e4b7a2ae7a5b9dbea9c5fb4d32cfd874b24616 SHA-256: ddebe2e84e14148ef3baf63091f2de2351476cebf289ef8446b95077258fc93b
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Weebly and other free hosting services, indicative of a link farm or phishing operation. The ClamAV detection and ML classifier strongly suggest malicious intent, specifically identified as phishing. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a campaign designed to redirect users to potentially malicious websites.

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 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.
  • 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://trafffi.ru/123?utm_term=motorcycle+scan+tool+for+sale PDF link annotation
    • https://tawigijonepoter.weebly.com/uploads/1/3/4/0/134012415/8387627.pdfIn PDF document text
    • https://zodemabu.weebly.com/uploads/1/3/4/8/134896511/sixazomima-jusesobat.pdfIn PDF document text
    • https://mosezusimoz.weebly.com/uploads/1/3/1/6/131637881/babadetaw-fulol.pdfIn PDF document text
    • https://vidajubobulixi.weebly.com/uploads/1/3/4/6/134650234/6938782.pdfIn PDF document text
    • https://site-1177991.mozfiles.com/files/1177991/88612493676.pdfIn PDF document text
    • http://wokokijup.iblogger.org/ip_address_information.pdfIn PDF document text
    • https://site-1176636.mozfiles.com/files/1176636/xuvibe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://powajokex.rf.gd/hole_celebrity_skin_album.pdfIn PDF document text
    • https://s3.amazonaws.com/jarirotexab/63146495088.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/avidemux_for_mac_os_x_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wakuzidi/sapivexinireridoseki.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/ews_reservation_certificate_format.pdfIn PDF document text
    • http://fusarafabar.epizy.com/27432336174.pdfIn PDF document text
    • https://s3.amazonaws.com/bubisifapagefe/google_chrome_os_64_bit.pdfIn PDF document text
    • http://xatudoxi.epizy.com/regagigoru.pdfIn PDF document text
    • http://zinuforonubas.rf.gd/lippo_group_annual_report.pdfIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/34153730887.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_off0000bc8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC8D 4980 bytes
SHA-256: 4fe76aab3be590fb886d01f18e9d5577b89a089ecbbcacb059677994c1be31a6
font_01_sfnt_off0000cda0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDA0 10464 bytes
SHA-256: 24b4de01fbd884b5dd9a010e67e526efe2e649cf43f19f68b73d9e6ce32f5f09

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