Malicious PDF — malware analysis report

Static analysis result for SHA-256 edaca8a5a90aaf9a…

MALICIOUS

PDF

76.6 KB Created: 2021-03-22 22:30:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: bd8743864d84d3eeb8bc53e1b5551b51 SHA-1: 531c86a465f15e96b10f70fecea7fc00ff328f7c SHA-256: edaca8a5a90aaf9a50a66942ef5cc6c67367c02c8bf08bb1ceb49fd3c676c06c
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, indicating a link farm designed to redirect users to potentially malicious sites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or scamming operations. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a malicious document designed to lead users to external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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://maypoin.ru/strik?utm_term=how+to+use+wiimote+on+dolphin+without+sensor+bar PDF link annotation
    • http://5coupons.info/79846814962h8a6l.pdfIn PDF document text
    • https://xedaliwim.weebly.com/uploads/1/3/1/4/131454603/5355902.pdfIn PDF document text
    • https://cdn.sqhk.co/dutaxato/NgdJijk/58925519399.pdfIn PDF document text
    • https://cdn.sqhk.co/rekutadis/iKghdmb/injustice_gods_among_us_ios_glitch_2019.pdfIn PDF document text
    • http://remontvorot24.com/dozekotukarirejopaxetudaqd4jt.pdfIn PDF document text
    • https://cdn.sqhk.co/fapewakuw/hgjhaGV/factorising_quadratic_expressions_worksheets.pdfIn PDF document text
    • https://bezamefiparafu.weebly.com/uploads/1/3/4/6/134665790/5443000.pdfIn PDF document text
    • http://perevod24-card2card.site/marililofuluv5ogf.pdfIn PDF document text
    • https://cdn.sqhk.co/muzewutipifa/ghhgFic/77636046274.pdfIn PDF document text
    • http://baffer-shop.space/using_format_of_excel_sheete8oam.pdfIn PDF document text
    • https://cdn.sqhk.co/nezusoxe/gwOggql/cake_designs_for_mens_50th_birthday.pdfIn PDF document text
    • http://kazimibi.getenjoyment.net/94394607579.pdfIn PDF document text
    • http://maritimog.medianewsonline.com/pan_card_cancellation_letter_format.pdfIn PDF document text
    • http://fiziwafofekaku.mygamesonline.org/rujifomifuvevisutateta.pdfIn PDF document text
    • http://tehnoprom.org/95781617549rkvps.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://puribobelumisi.rf.gd/panetegezetepulowazi.pdfIn PDF document text
    • http://sodokeb.epizy.com/6458124075.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_off0000ea38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA38 5392 bytes
SHA-256: 5f8c4089bfc16f2e87980b7e72ae38b3950938c82feb4d6ea3fa7266ab130d5c
font_01_sfnt_off0000fc63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC63 11948 bytes
SHA-256: 183002bc058d3af38f7b194522d875cbc325c31a11179b75a5c5102bdb6d6106

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