Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ceec90eddf5fd09…

MALICIOUS

PDF

87.5 KB Created: 2021-05-04 10:02:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c74a8ad67526f9dfd667cbf86b080a59 SHA-1: d958ccbcc2c1cccccbdc34f159de9f1c819a823a SHA-256: 2ceec90eddf5fd09c5b340ae8d4c776c30db1bdf30096d3cd3a8de40d22b1c27
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://vilenefex.ru/strik?utm_term=free+diary+of+a+wimpy+kid+books+to+read PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4464083/normal_601b3d88a2b77.pdfIn PDF document text
    • https://dodukitomot.weebly.com/uploads/1/3/1/4/131407143/1450996.pdfIn PDF document text
    • https://vakonawokedoze.weebly.com/uploads/1/3/4/5/134522954/2c8559.pdfIn PDF document text
    • https://podogavefa.weebly.com/uploads/1/3/1/4/131438056/basuzinoxaxorivutase.pdfIn PDF document text
    • https://risimapi.weebly.com/uploads/1/3/4/3/134321435/xutobizezo_tizizilokino.pdfIn PDF document text
    • https://divowotekek.weebly.com/uploads/1/3/4/7/134759223/7589933.pdfIn PDF document text
    • https://vopesowe.weebly.com/uploads/1/3/4/6/134638419/1304281.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407064/normal_5feedde38466c.pdfIn PDF document text
    • http://fizuluwudig.iblogger.org/antigona_anouilh_espaol.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461767/normal_6005337129c3b.pdfIn PDF document text
    • https://dunexagog.weebly.com/uploads/1/3/5/3/135303431/sufexud.pdfIn PDF document text
    • https://sitegevom.weebly.com/uploads/1/3/4/6/134664280/wepetasovagago.pdfIn PDF document text
    • https://kajizifobizixa.weebly.com/uploads/1/3/3/9/133997117/xilalininitot-kikitatogunuxup-dupasaxu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369520/normal_600832dde813c.pdfIn PDF document text
    • http://zilixijabukepul.iblogger.org/badminton_court_size_in_feet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://buxuzob.epizy.com/21931001288.pdfIn PDF document text
    • http://vavipok.epizy.com/zetoxe.pdfIn PDF document text
    • http://refaruzevogot.epizy.com/12050990155.pdfIn PDF document text
    • http://dawifugoxumevej.rf.gd/telephone_billing_system_project_in_vb._net.pdfIn PDF document text
    • http://kutuwawelozekot.rf.gd/busixigejar.pdfIn PDF document text
    • http://pevudavef.rf.gd/jawidopobusofud.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_off0001190a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1190A 5508 bytes
SHA-256: 2e6c53500b59bcb51d56eaff725e42cb54852b6013cd9224c0aa502641f33156
font_01_sfnt_off00012bc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BC9 10888 bytes
SHA-256: de1c63d95ed95083adc266c2c7ec78c130d87bd55ba652435a0cae6eb07dbdc4

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