Malicious PDF — malware analysis report

Static analysis result for SHA-256 360ad12793fa0032…

MALICIOUS

PDF

82.2 KB Created: 2021-03-18 02:58:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 92c7141481ea1d1c1154f30240ab6952 SHA-1: ea48f1d3bfae6743372be8196a23b4d9b60cff56 SHA-256: 360ad12793fa003254ae40bc623b812182d0a87a4ea883c1961329bc42b430bd
186 Risk Score

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 0.9993

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://crophysi.ru/wix?keyword=knights+of+the+frozen+throne+hearthstone+guide PDF link annotation
    • http://virnet77.ru/mivonojolojaxuzojeybdpu.pdfIn PDF document text
    • https://ketuvukelese.weebly.com/uploads/1/3/4/3/134351906/lozonajitoda-kepubovurexa-xolibipodofav-mumemifidogovob.pdfIn PDF document text
    • https://cdn.sqhk.co/savageven/Uie4wgf/kumadevisasama.pdfIn PDF document text
    • https://cdn.sqhk.co/devisofage/jiihaid/67145872679.pdfIn PDF document text
    • http://topcreditreport.info/82109945822ykcge.pdfIn PDF document text
    • https://cdn.sqhk.co/petebeki/iieBjgr/desesimewed.pdfIn PDF document text
    • https://jawizadobem.weebly.com/uploads/1/3/4/7/134773472/3439279.pdfIn PDF document text
    • https://cdn.sqhk.co/dasisogi/hhji2Mj/marvel_realm_of_champions_wikia.pdfIn PDF document text
    • https://cdn.sqhk.co/pojimisuso/grge0CM/89975847671.pdfIn PDF document text
    • http://letgtma.bid/gajesipeswrg4l.pdfIn PDF document text
    • https://gomemetunugup.weebly.com/uploads/1/3/2/7/132712315/fozijo-guxodevebof-gokeda-siberu.pdfIn PDF document text
    • https://lozugukavokukes.weebly.com/uploads/1/3/4/3/134357100/nubowudezevirewa.pdfIn PDF document text
    • https://bezubimuxidisa.weebly.com/uploads/1/3/1/4/131453869/mewob.pdfIn PDF document text
    • https://sofamilases.weebly.com/uploads/1/3/5/4/135401016/gusifeperagasix_zojesofimoxono.pdfIn PDF document text
    • https://depopuxa.weebly.com/uploads/1/3/4/8/134893869/448623.pdfIn PDF document text
    • https://pagiburefi.weebly.com/uploads/1/3/4/1/134108706/duvowobenexapafu.pdfIn PDF document text
    • http://nicechange.space/58875032596mw7ry.pdfIn PDF document text
    • https://zikegebuner.weebly.com/uploads/1/3/4/8/134856814/559fc1.pdfIn PDF document text
    • https://wovupidej.weebly.com/uploads/1/3/4/6/134687137/zonawaxokulaju.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/sowirutelevolur/17394579465.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/22281389950.pdfIn PDF document text
    • https://s3.amazonaws.com/fisulefajow/chrysler_grand_voyager_2001_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/buriropetiwetakamerogelup.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_off00010543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10543 5156 bytes
SHA-256: 02705c1c89677fac77762dcd7bfcbfe3892942aaab1eb36ecdccbfddc0c4fab3
font_01_sfnt_off000116dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116DC 10632 bytes
SHA-256: 78883c52ab78b4cfb80d46fd65d2a1642143000daebc713cb9ee303641a9fea8

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