Malicious PDF — malware analysis report

Static analysis result for SHA-256 c62cbda4fa099e44…

MALICIOUS

PDF

73.0 KB Created: 2021-02-19 17:12:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: da60d5fc59aab95b0ff2f346141cd5f7 SHA-1: d83fcf818477d1f4bae88abcc9af54ae0cc83e95 SHA-256: c62cbda4fa099e44eae726cdac7983d03443089ffbdfe2a921fbbba9106320de
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=navy+prt+standards+2020+male+40-44 PDF link annotation
    • https://bunemevomuw.weebly.com/uploads/1/3/4/7/134733911/nakikozetokexe_fufigobij_pavubofaxu_kisiner.pdfIn PDF document text
    • https://sujujiga.weebly.com/uploads/1/3/1/3/131379538/1dc9fb38f372da.pdfIn PDF document text
    • https://pufinixebajev.weebly.com/uploads/1/3/0/8/130873949/pifosaredupibikirada.pdfIn PDF document text
    • https://rudarizegofuk.weebly.com/uploads/1/3/4/3/134355262/megonemi.pdfIn PDF document text
    • https://katudiwuf.weebly.com/uploads/1/3/6/0/136006549/5747153.pdfIn PDF document text
    • http://bogavevi.22web.org/pigadenurerizavapafuj.pdfIn PDF document text
    • https://tatisosef.weebly.com/uploads/1/3/5/3/135333589/fezir_womizulimidelik.pdfIn PDF document text
    • https://sufafiderek.weebly.com/uploads/1/3/0/8/130814754/rovuzegerowumij-nuluwu-xapozafarezovo-lojenovu.pdfIn PDF document text
    • https://zivixitusinuz.weebly.com/uploads/1/3/1/3/131380786/1915031.pdfIn PDF document text
    • https://tutuludoj.weebly.com/uploads/1/3/0/8/130874598/vugubi.pdfIn PDF document text
    • https://nezuzubes.weebly.com/uploads/1/3/5/3/135327702/dobojexizebut.pdfIn PDF document text
    • https://debefapedokofip.weebly.com/uploads/1/3/4/3/134373265/d556ed.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fanodawenu.rf.gd/pagevelowafefopejiv.pdfIn PDF document text
    • http://zisunajupanege.rf.gd/aprilaire_steam_humidifier_manual.pdfIn PDF document text
    • http://wavubodalut.epizy.com/88011853265.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_off0000dad8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD8 5628 bytes
SHA-256: c885f413c6b50935dd71d75aa969c9d174c38351bbdbcd753da61a309bedadbf
font_01_sfnt_off0000ee08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE08 12392 bytes
SHA-256: 825229a6fbc7f68dcf7e0038b8e8443462f53913d64795a883315f4490ef86cd