Malicious PDF — malware analysis report

Static analysis result for SHA-256 23d6b6ab736ce3f8…

MALICIOUS

PDF

89.5 KB Created: 2021-04-01 19:28:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 32b88f4ac564b8acc9469cc749a3e1d2 SHA-1: b4ced18e6fc6183b6c4569e63f504b0cbd805c0d SHA-256: 23d6b6ab736ce3f81a13369a89c0547070ef2f4ab51342f9b03f15352efd7934
136 Risk Score

Malware Insights

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

The file is a PDF that employs a lure related to popular media to entice users. It contains multiple external URIs, with one identified as an SEO redirector likely leading to a phishing or malware download page. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://zajinet.ru/strik?utm_term=the+heirs+episode+2+subtitle+indonesia+full+movie PDF link annotation
    • http://miromawetibikew.mywebcommunity.org/administracion_publica_ecuador.pdfIn PDF document text
    • http://microbladingcertificationdfw.org/rocketbook_app_for_androidot49w.pdfIn PDF document text
    • http://pokypka.xyz/wobabekosajiv1fp.pdfIn PDF document text
    • http://desajegurake.scienceontheweb.net/11438077555.pdfIn PDF document text
    • http://jusukigib.sportsontheweb.net/subacute_cutaneous_lupus_erythematosus.pdfIn PDF document text
    • http://dfds.in/kenmore_washer_spin_cycle_not_working_or_draining2ep60.pdfIn PDF document text
    • http://lozhobelir.space/levewadutidosanntunv.pdfIn PDF document text
    • http://naturalm.space/7877146063273cbm.pdfIn PDF document text
    • http://tamodemuror.getenjoyment.net/zifoboz.pdfIn PDF document text
    • http://siwivelijutore.medianewsonline.com/gopegawojexifi.pdfIn PDF document text
    • http://nibajafij.medianewsonline.com/ballpoint_pen_drawing.pdfIn PDF document text
    • http://kpovli.ru/manifiesto_comunista_resumen0r6wu.pdfIn PDF document text
    • http://operationhomeplate.com/nojegudokezojj4t6b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/franz_kafka_metamorphosis_major_themes.pdfIn PDF document text
    • https://s3.amazonaws.com/befafuni/degosorixetenurivorez.pdfIn PDF document text
    • https://s3.amazonaws.com/vinivuxo/invoice_template_fillable_free.pdfIn PDF document text
    • https://s3.amazonaws.com/papuja/cds_exam_registration_form.pdfIn PDF document text
    • http://xobeminal.atwebpages.com/bi_weekly_calendar.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/heise_notepad_portable.pdfIn PDF document text
    • https://s3.amazonaws.com/ragejufa/xaloruwademit.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/my_fathers_dragon_read_aloud_chapter_6.pdfIn PDF document text
    • http://nakixaxev.myartsonline.com/32748204363.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010794.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10794 6120 bytes
SHA-256: fd02ebc2729c48fc9733dad056d992f1e6eb3cd84ba4c1d526d64f526ee344c5
font_01_sfnt_off00011c55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C55 5564 bytes
SHA-256: ad65822c915fb6eae88d83379be2bc04afacf326facb0efa3587a714ce75055a
font_02_sfnt_off00012f11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F11 11288 bytes
SHA-256: 564f5b44b8b7b1d9777f757240e58f792407ca046455d0c21e4dcaccfd9d6093

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