Malicious PDF — malware analysis report

Static analysis result for SHA-256 9830dde91286890c…

MALICIOUS

PDF

70.4 KB Created: 2021-03-12 21:51:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: cff653edd7771fdf1a72a8f06b3bb912 SHA-1: bd0500c4bea1888337ff10094987f7e0f5c46fca SHA-256: 9830dde91286890c4424380ea0b78e184a8f5dbfa0e2d313500a82b8bd2072e3
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs disguised as instructions for a TV stand, a common lure for phishing or malware delivery. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of external URIs and link farm heuristics further supports the classification as a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://nipisod.ru/strik?utm_term=mainstays+parsons+cubby+tv+stand+instructions+pdf PDF link annotation
    • https://lemorixumo.weebly.com/uploads/1/3/4/7/134748879/zisibeso.pdfIn PDF document text
    • http://xovebud.mygamesonline.org/livoxeludolosus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454547/normal_604a7c0a81375.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455174/normal_60121814bd0c0.pdfIn PDF document text
    • http://hamlikjorettoop.ru/how_to_set_a_tough_solar_illuminator_watchmxz68.pdfIn PDF document text
    • http://goshop32.site/71089077684otwgj.pdfIn PDF document text
    • https://cdn.sqhk.co/totimujid/gwgc4ic/31986768657.pdfIn PDF document text
    • http://photoforce.ru/tibepalez6u.pdfIn PDF document text
    • http://naxajogilelog.medianewsonline.com/pakuzunedizebazikesas.pdfIn PDF document text
    • http://bomaduworofa.medianewsonline.com/48709264220.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373983/normal_601af2ebdda8f.pdfIn PDF document text
    • http://lotto-investclub.com/officejet_pro_8600_not_printing_mac9kuv3.pdfIn PDF document text
    • https://wivupenoremew.weebly.com/uploads/1/3/0/7/130775018/sokuvudusaku.pdfIn PDF document text
    • https://cdn.sqhk.co/dukosisevu/ZEmCjeI/jinizurin.pdfIn PDF document text
    • http://christmas-gift.ru/vagenogagekulefilih3ee7.pdfIn PDF document text
    • http://gejulavofanutar.mygamesonline.org/11415067737.pdfIn PDF document text
    • https://cdn.sqhk.co/jojikoxazew/aRJR3ih/shooter_cast_season_4.pdfIn PDF document text
    • http://cosmeteca.com/jugexusowarutefovakimobepc1wh7.pdfIn PDF document text
    • https://cdn.sqhk.co/lufezeralon/cTOaZwE/26497287508.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dolanuvusipegu.myartsonline.com/stock_exchange_open_on_weekends.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD302 5424 bytes
SHA-256: 2512fcea42991752cfdb2cc577ccd153c10716a0503f4086eb5b5d79f8b73b15
font_01_sfnt_off0000e599.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE599 11092 bytes
SHA-256: ae75fddf7b437f4b981f8a935ce799372cc953c64b3b3bf5ad5ba3a82a6722b2

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