Malicious PDF — malware analysis report

Static analysis result for SHA-256 9afb84448b29f273…

MALICIOUS

PDF

77.6 KB Created: 2021-03-18 23:52:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 78584356e231d5ff688b7b2f403e1f42 SHA-1: 569ed01f54057218cf6e51d592234c0707cf0e9a SHA-256: 9afb84448b29f2731e7266e3c889be68c5bd68cbcf3c1d079c01da65818ff56e
156 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 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
  • 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.
  • 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://gimoguvi.ru/strik?utm_term=what+fighting+style+does+anakin+use PDF link annotation
    • https://ramimuluvisefo.weebly.com/uploads/1/3/0/7/130775145/vugilesub.pdfIn PDF document text
    • https://rubirilubuz.weebly.com/uploads/1/3/4/2/134266621/0f988fc2.pdfIn PDF document text
    • http://toboxifazakun.22web.org/pejolurisepulejuviwuwevul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426810/normal_5fe9ef0c45b39.pdfIn PDF document text
    • https://rutedidatares.weebly.com/uploads/1/3/4/4/134490949/lisafivor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421943/normal_601c5d3a0ad8e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495390/normal_5fc8622aca8a5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383930/normal_5fe1ff91dd369.pdfIn PDF document text
    • https://xadifera.weebly.com/uploads/1/3/1/4/131438156/povanotekolu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/perurulexi/sikuxutotudorajekenexex.pdfIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/vanessa_carlton_thousand_miles_piano_sheet_music.pdfIn PDF document text
    • http://gotewadale.epizy.com/codex_chaos_knights_8th_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/balance_general_ejemplo_en_forma_de_reporte.pdfIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/sap_basis_administration_tutorial.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/ludelawesigu.pdfIn PDF document text
    • http://tawenaxogiminax.epizy.com/kabogir.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/treatment_of_pulmonary_hypertension_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwimadaneb/police_report_template_printable.pdfIn PDF document text
    • http://fubolorira.epizy.com/jezuramal.pdfIn PDF document text
    • https://s3.amazonaws.com/dozuga/38916084888.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e45c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE45C 5136 bytes
SHA-256: ed0cc740a3593081c789834c331cf7c9580eeb4827854afb910db5778ee11c56
font_01_sfnt_off0000f5e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E5 10984 bytes
SHA-256: 46bd6ede8b9b8d686a63901384c0b46ed0f8d5e17c269beb8778024fa9a65362
font_02_sfnt_off00011abd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ABD 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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