Malicious PDF — malware analysis report

Static analysis result for SHA-256 57a171e422ce7484…

MALICIOUS

PDF

66.9 KB Created: 2021-03-23 00:48:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: b373650deb1695d6eba2aca2e890108d SHA-1: 7495da1e6184f118f2d0442953dde694bd43c710 SHA-256: 57a171e422ce7484665aa8e886d7b95c05cb9ffc3b8a729b1b58fbac7bfc871e
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that leads to a suspicious domain, identified by ML classifiers and ClamAV as malicious. The document body, though partially corrupted, suggests a lure related to 'Exterior plywood sheets 9mm', likely intended to trick users into visiting the malicious URL. No scripts were extracted, but the presence of external URIs and the ML classification strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://golowaki.ru/123?utm_term=exterior+plywood+sheets+9mm PDF link annotation
    • https://cdn.sqhk.co/zolilobup/ScHhbDE/cell_machine_sandbox_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzifixe/idgglji/action_hero_movies_on_netflix.pdfIn PDF document text
    • http://beliyden.xyz/34731064916j9ljb.pdfIn PDF document text
    • http://fefiwizam.sportsontheweb.net/renoxelewotewobiwetovod.pdfIn PDF document text
    • http://xivobivivupe.mygamesonline.org/gopifalofag.pdfIn PDF document text
    • http://pekibimige.mygamesonline.org/acquirer_s_multiple_book.pdfIn PDF document text
    • http://berasowugixo.mywebcommunity.org/75232668653.pdfIn PDF document text
    • http://reliables.ru/46894905339u4vli.pdfIn PDF document text
    • https://cdn.sqhk.co/jisepozidis/heifWhc/kebinewoborobona.pdfIn PDF document text
    • http://dufigep.scienceontheweb.net/sivalepufunudiraga.pdfIn PDF document text
    • https://cdn.sqhk.co/kefaforuletu/1r1iKhi/gebudiduturusatifer.pdfIn PDF document text
    • https://cdn.sqhk.co/votezevon/jcowm36/juxekoletifodirosovobu.pdfIn PDF document text
    • http://selozufuwadapuw.66ghz.com/basic_grammar_rules_for_speaking_english.pdfIn PDF document text
    • http://kixamugefuwa.22web.org/la_diglossie_et_le_bilinguisme.pdfIn PDF document text
    • https://www.builderdepot.co.uk/9mm-hardwood-external-grade-wbp-plywood-b-bb-2440mm-x-1In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/josowipivegabizi.pdfIn PDF document text
    • http://bagitokukuwulo.epizy.com/97997478209.pdfIn PDF document text
    • https://s3.amazonaws.com/mekonulegipero/simple_excel_invoice_template_free.pdfIn PDF document text
    • http://fejivexol.epizy.com/gitunemetatifejezigu.pdfIn PDF document text
    • https://s3.amazonaws.com/geradi/6815330874.pdfIn PDF document text
    • https://s3.amazonaws.com/kavalukato/use_case_diagram_template_draw._io.pdfIn PDF document text
    • http://pisepivowunasi.rf.gd/film_camera_app_free.pdfIn PDF document text
    • http://nuzavaxevarap.epizy.com/19500564004.pdfIn PDF document text
    • https://s3.amazonaws.com/leteraxewe/belajar_bahasa_inggris_dasar.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_off0000ca07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA07 5364 bytes
SHA-256: 632c6d7d7d6178df52300edb60b00d2a1537f27bfc71b794e55cb04ae3265c47
font_01_sfnt_off0000dc39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC39 9880 bytes
SHA-256: 97eaa31291ab5ea66a6e9fa1aef46240b19f0a726f777022d4c0ac436976395d

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