Malicious PDF — malware analysis report

Static analysis result for SHA-256 65bc711470d32eb0…

MALICIOUS

PDF

76.3 KB Created: 2021-03-09 13:31:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 2fabd24b01c33bccf3326d327378a8ec SHA-1: 70a96d5a93ccd6a94db0aa29dcba2f119e9d4ebe SHA-256: 65bc711470d32eb0f99d2b0629bc93f1b8861f4ff759727fc802fdd4042c0215
126 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous links to external websites, many of which are hosted on disposable domains, suggesting a phishing or scam attempt. The document body, though heavily obfuscated, contains references to '2020 appropriation bill pdf' and 'wkhtmltopdf', indicating a lure to a potentially malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://jottigo.ru/award?keyword=2020+appropriation+bill+pdf PDF link annotation
    • http://aduo5.online/how_to_replace_pump_on_honda_pressure_washerpv507.pdfIn PDF document text
    • https://cdn.sqhk.co/zowolanazew/9TJiiUV/in_god_we_trust_lyrics_kevin.pdfIn PDF document text
    • http://evromotors.net/18732163280v29sx.pdfIn PDF document text
    • http://idealslim-italiaofficial.site/72506894911s0uft.pdfIn PDF document text
    • https://cdn.sqhk.co/fuluzezufe/ib5ATie/fuvewedoturexukibudebumib.pdfIn PDF document text
    • http://leaninrzpd.site/tipos_de_comunicacion_que_existen_en_la_actualidadsmn5c.pdfIn PDF document text
    • https://cdn.sqhk.co/latusetime/Jic4Chb/99567594689.pdfIn PDF document text
    • http://topsale.pro/ncert_political_science_book_class_11_in_hindi370fe.pdfIn PDF document text
    • http://sentytld.online/jizetepofu2frp.pdfIn PDF document text
    • http://foyou.store/zumutesadavikogogalizalrbl91.pdfIn PDF document text
    • https://kokezixunilo.weebly.com/uploads/1/3/4/0/134096179/9d0148f38fa5ee.pdfIn PDF document text
    • http://arbitestpark.xyz/standard_iso_9001_din_2015vpzuz.pdfIn PDF document text
    • https://cdn.sqhk.co/lekusovu/je1jeE5/6931130513.pdfIn PDF document text
    • http://dream-stat.ru/blank_calendar_template_october_2018cgb8s.pdfIn PDF document text
    • http://jirafka.space/zoxowolomogararizewor18j9.pdfIn PDF document text
    • http://uablog.website/leadership_skills_resume_phrases_exampleslk6mk.pdfIn PDF document text
    • http://stav-games.ru/72321360800ovmp3.pdfIn PDF document text
    • https://lanutitokoxoziv.weebly.com/uploads/1/3/4/0/134096970/sumabejoviz_luzelefiviv_suzasaxadaniruk_fixutav.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://dbba0f06-1911-40f0-8c80-a2638c7f81cc.filesusr.com/ugd/b13fd1_fe0b9723879a41a8a8500a2eb1c0ad40.pdf?index=trueIn PDF document text
    • https://5902ff30-e651-486c-ac37-3e8383bfa78f.filesusr.com/ugd/f35da0_4128ff057afa4923a972bbf0313fba2f.pdf?index=trueIn PDF document text
    • https://84daacc9-7e90-4c5d-b1ed-526950900c49.filesusr.com/ugd/73f3b0_a6fa5d4d499d40efaa879618aa69080e.pdf?index=trueIn PDF document text
    • https://121f8fc1-d270-4171-a721-8ccd656fc20f.filesusr.com/ugd/2ca22b_461fec7928224047a80612d4d328a45c.pdf?index=trueIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f401.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF401 5176 bytes
SHA-256: d79d600a911548cb3c9866d48b2ee41a38bdc6b08fc40f62e7f84749f2ff4edb
font_01_sfnt_off000105a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A1 10328 bytes
SHA-256: 27d0ea3f0ada78abc27caf43161b7776cc6472efd1ff293cf71359ed0e3cc748

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