Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5462c263a9fedbd…

MALICIOUS

PDF

75.7 KB Created: 2021-03-28 21:14:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: af5e441f87099433d33b4c357804f0dc SHA-1: ee612300151b4ae102f21e9898af4a7260d1e094 SHA-256: d5462c263a9fedbd301d44827734b74a1666a86ed65d03cd94102d4a7ffed9a0
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains multiple external URIs, with a primary suspicious URL pointing to a financial claim lure. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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 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://lozipotod.ru/123?utm_term=audi+finance+ppi+claim+form PDF link annotation
    • http://wowitaly.pro/poluwuvipagukaferixalichm9i.pdfIn PDF document text
    • http://bikejesoxatelo.mygamesonline.org/sevomirodupafekivavoleka.pdfIn PDF document text
    • http://kezekimoridim.22web.org/clat_question_paper_with_answers.pdfIn PDF document text
    • http://jamotovoxut.mywebcommunity.org/fisidumenebezateregujuv.pdfIn PDF document text
    • http://pelubexeto.getenjoyment.net/wonky_donkey_book_free.pdfIn PDF document text
    • http://gijixig.22web.org/kixetu.pdfIn PDF document text
    • http://feyakast.online/38591321092teiu4.pdfIn PDF document text
    • http://tiwujatujoput.mygamesonline.org/6267801798.pdfIn PDF document text
    • http://tegokujili.iblogger.org/27538638894.pdfIn PDF document text
    • http://ruwazumusef.scienceontheweb.net/que_es_un_manual_de_organizacion_y_procedimientos.pdfIn PDF document text
    • http://naliputa.mywebcommunity.org/the_power_of_positive_thinking_norman_vincent_peale_wikipedia.pdfIn PDF document text
    • http://vukefof.22web.org/42111062491.pdfIn PDF document text
    • http://bio-ita.fun/pexavazugomawawixataxope18z9w.pdfIn PDF document text
    • http://runojiwum.getenjoyment.net/11512563277.pdfIn PDF document text
    • http://buybritishcat.com/reportajes_radiales_ejemplosl5fvq.pdfIn PDF document text
    • http://profit-makers.club/85103424619vx800.pdfIn PDF document text
    • http://verifybadgehelp.com/podegudogodokubemikv4so6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://konemuga.epizy.com/molarakuzipajezu.pdfIn PDF document text
    • http://gilupusaxuzamo.epizy.com/array_function_in_php_with_example.pdfIn PDF document text
    • http://rusowemiwa.rf.gd/pegugopu.pdfIn PDF document text
    • http://jisunopesaluzi.atwebpages.com/98353143167.pdfIn PDF document text
    • http://jegovogetaferop.epizy.com/fueling_the_future_ielts_reading_answers.pdfIn PDF document text
    • http://dubabin.rf.gd/65701396909.pdfIn PDF document text
    • http://bidovug.rf.gd/mathematical_models_of_infectious_disease_transmission.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_off0000e885.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE885 5112 bytes
SHA-256: 36f69dcf16f52a0c2e39867ce208ad28970d04a2ddad025fc3f344dd18ee35dc
font_01_sfnt_off0000f9d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D7 11456 bytes
SHA-256: 0ed67ab5729e3804c1a79ed8e93328fbdd943577211dbbd3ee346f1644340bdf

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