Malicious PDF — malware analysis report

Static analysis result for SHA-256 869e9d28a614dc42…

MALICIOUS

PDF

75.4 KB Created: 2021-02-23 11:41:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 658339bf7f14cf59a77a142db32368c7 SHA-1: 1e6f92b1ca923931aaf73eb03c80c8b27d07f052 SHA-256: 869e9d28a614dc425170a9b9506514349605d3fec0a5b8c25d082d26c115a336
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with critical heuristics indicating it links to known malicious redirector infrastructure and is part of a link farm. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=glenn+middle+school+mascot In PDF document text
    • http://sodazetibup.iblogger.org/vexenipalazizawukadezotob.pdfIn PDF document text
    • https://jivenikovo.weebly.com/uploads/1/3/4/3/134308789/ruwuvuxusixelir.pdfIn PDF document text
    • http://promoocaoameericanas.com/lexaxokireqq3dp.pdfIn PDF document text
    • https://lokanasa.weebly.com/uploads/1/3/5/2/135299929/bedeseramegowol-kamabusin-takoxu-buzapux.pdfIn PDF document text
    • https://gagejewepaji.weebly.com/uploads/1/3/4/4/134444149/pokisosurepisi-tigobama-nejufadaja-mefesevam.pdfIn PDF document text
    • http://andyhongdigital.com/gumajofixijaazp32.pdfIn PDF document text
    • http://optalpha.com/45356874180r8wg4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/suzujewa/what_is_a_pump_float_switch.pdfIn PDF document text
    • https://s3.amazonaws.com/jeponowon/jojejorowevunafifek.pdfIn PDF document text
    • https://s3.amazonaws.com/pilazi/12835974179.pdfIn PDF document text
    • http://ralixafuligo.rf.gd/clinical_chemistry_principles_techniques_and_correlations.pdfIn PDF document text
    • http://nezarokex.epizy.com/allstar_performance_aluminum_air_cleaners.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/54189238833.pdfIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/vepupubefakozodawuvas.pdfIn PDF document text
    • http://fenulujexita.epizy.com/jedatevaz.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/jeduzamad.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/34599675406.pdfIn PDF document text
    • https://s3.amazonaws.com/fidobakipivogit/45730288690.pdfIn PDF document text
    • http://wadatenut.rf.gd/figodisesugememitikabor.pdfIn PDF document text
    • https://s3.amazonaws.com/ximupuv/6792496453.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_off0000ebe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE5 5112 bytes
SHA-256: cf3d1395298f6ccc246accca53133b0506b5e46cfc19b59ed3022a720e093ba4
font_01_sfnt_off0000fd23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD23 10336 bytes
SHA-256: 13f3aa47ac9b4b05946e2f7d58bc10d33833d186a4c4eb4f0c9976d9d325a316

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