Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e9813cb7091405d…

MALICIOUS

PDF

70.5 KB Created: 2021-03-04 06:47:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: f587fd383d592614cbf89f1b037a93cc SHA-1: 79aa375d5b87094a190222f5fccb19251bc51007 SHA-256: 8e9813cb7091405d1ee24374a8005863692ef6942b6fded638a49607eb351284
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a technique often used for SEO manipulation or to redirect users to malicious sites. ClamAV and ML classifiers strongly indicate maliciousness, specifically flagging it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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/wix?keyword=menos+miedos+mas+riquezas+pdf PDF link annotation
    • https://memuwumobodedo.weebly.com/uploads/1/3/5/9/135974490/3bc23.pdfIn PDF document text
    • https://cdn.sqhk.co/xojelumegasi/6geTjbY/didion_milling_wisconsin.pdfIn PDF document text
    • https://jikuvubavul.weebly.com/uploads/1/3/5/9/135964228/e82793.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452193/normal_5ff8573cb0fba.pdfIn PDF document text
    • https://zipufalazuviw.weebly.com/uploads/1/3/1/8/131856517/e19522d54b4c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426410/normal_602e394cb23f9.pdfIn PDF document text
    • https://wufodiwefoveve.weebly.com/uploads/1/3/4/8/134891768/gevuguw.pdfIn PDF document text
    • https://xejoxobufedad.weebly.com/uploads/1/3/3/9/133997298/5026658.pdfIn PDF document text
    • http://xigirirata.22web.org/naredobarasileresapuka.pdfIn PDF document text
    • https://fabezetenonuke.weebly.com/uploads/1/3/4/8/134846610/kufusaduririjekenixe.pdfIn PDF document text
    • http://meweremidef.iblogger.org/sakodilewamapi.pdfIn PDF document text
    • https://rifivubego.weebly.com/uploads/1/3/1/4/131407021/tomogevesatowexazuv.pdfIn PDF document text
    • https://cdn.sqhk.co/tejurorado/8hbiiNH/vaziledezufebuvurexazibum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426421/normal_6031b070d6b7b.pdfIn PDF document text
    • https://wepebajaka.weebly.com/uploads/1/3/4/5/134588919/5d1e354.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gafomawonerif.rf.gd/62755056798.pdfIn PDF document text
    • http://jilovin.epizy.com/citra_emulator_android_new_version.pdfIn PDF document text
    • https://s3.amazonaws.com/xetasif/xiwoxupubumugaritodipi.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/pink_line_metro_route_map.pdfIn PDF document text
    • http://dukazel.rf.gd/affineur_fromager_formation.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/18684209997.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_off0000d4f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4F9 5336 bytes
SHA-256: c587ede29f1a5806dd7cc39c11c0e86d7a9806bfed409f0f9951f767eb632989
font_01_sfnt_off0000e714.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE714 10864 bytes
SHA-256: d69de3d19a86ac7987ee930081dc17b08a30d7565fff9b1a7fe1770ec738314c

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