Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff3acdfb68ae1874…

MALICIOUS

PDF

65.9 KB Created: 2021-03-06 12:02:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: a1080489b75ec4dbaf2aa81f0abcd329 SHA-1: 5575e8adda0a3dc16473ab6d05feb0884bef138e SHA-256: ff3acdfb68ae1874278717a4f66213562b9bf9ef2c16697b5353a5fbb512fee8
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://leonvi.ru/award?keyword=boss+ls-2+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4501054/normal_60295b383120f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501975/normal_601671106d49c.pdfIn PDF document text
    • https://cdn.sqhk.co/gixenako/o1ifhf6/beat_ride_app_colombia_ltda_nit.pdfIn PDF document text
    • https://cdn.sqhk.co/rufosopufu/gfGhege/pogugevaxaretotal.pdfIn PDF document text
    • https://cdn.sqhk.co/furigelo/hwjhjiw/knights_inn_corpus_christi_texas.pdfIn PDF document text
    • https://bikawinudom.weebly.com/uploads/1/3/4/5/134595305/jevesebolo.pdfIn PDF document text
    • https://gimogelego.weebly.com/uploads/1/3/4/6/134601730/gakubogeminifi.pdfIn PDF document text
    • https://cdn.sqhk.co/gijosevozu/ibjjDPk/linen_cabinet_doors.pdfIn PDF document text
    • http://deliwubavamir.mypressonline.com/lewisitujojubelax.pdfIn PDF document text
    • https://loribipusav.weebly.com/uploads/1/3/1/3/131379532/6558084.pdfIn PDF document text
    • https://cdn.sqhk.co/gajeneset/bChhgj8/giwuxejowovisaben.pdfIn PDF document text
    • https://cdn.sqhk.co/negapevu/Qiigg3y/59573392910.pdfIn PDF document text
    • http://bibopasaxuvibu.mypressonline.com/bhagavad_gita_quotes_in_english.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414679/normal_5fe361cf8adc3.pdfIn PDF document text
    • https://cdn.sqhk.co/kufiremikaf/hjBTjj0/three_scoop_ice_cream_cone_clipart.pdfIn PDF document text
    • http://setopin.mypressonline.com/advance_math_formula_in_hindi.pdfIn PDF document text
    • http://gepopusoka.mypressonline.com/vowiv.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ligiwekuxote.myartsonline.com/tijowusuzoletukitej.pdfIn PDF document text
    • http://piwakitidi.onlinewebshop.net/lefomodoxun.pdfIn PDF document text
    • http://dolanuvusipegu.myartsonline.com/tcnicas_de_recoleccin_de_datos_cuantitativos_segn_sampieri.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_off0000c766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC766 4948 bytes
SHA-256: a714a4b2d343794b46170ac6339959c55904ed78938efbed3c6ceac8bd7c3b3a
font_01_sfnt_off0000d830.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD830 10404 bytes
SHA-256: 8c4962e1bd352b24e437510840ba45826fdda61eb6372caa084e890f9c4cd0fa

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