Malicious PDF — malware analysis report

Static analysis result for SHA-256 817b473c84daa33b…

MALICIOUS

PDF

71.7 KB Created: 2021-02-27 21:42:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 811ae23df799184c35c4b9d951253eae SHA-1: 4a9e8c5c559a1f1804e6edad12d98247d767d671 SHA-256: 817b473c84daa33b033fd024d0aafef588a92cf28eb3963130e456f1ef88f65d
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, many of which point to suspicious domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, appears to be related to search terms, reinforcing the idea of a lure to external malicious 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://maypoin.ru/wix?keyword=production+and+operations+analysis+mcgraw+hill+pdf PDF link annotation
    • http://agreevudb.rest/50963866691b6z0.pdfIn PDF document text
    • http://intereriia.com/pufodovubozokaffj19.pdfIn PDF document text
    • http://repair-kvadrokopterov.ru/pets_at_home_dwarf_hamster_care_guide40lkt.pdfIn PDF document text
    • https://bokefelefu.weebly.com/uploads/1/3/1/3/131383825/3154402.pdfIn PDF document text
    • https://xofiguguja.weebly.com/uploads/1/3/2/7/132710561/betudujenemi.pdfIn PDF document text
    • https://sutesesa.weebly.com/uploads/1/3/4/8/134871168/pemedefuretuno-koxedotom-gidoziboxu.pdfIn PDF document text
    • https://cdn.sqhk.co/xetokive/jhchi3R/sugegu.pdfIn PDF document text
    • https://ximavubakalik.weebly.com/uploads/1/3/0/7/130776508/4886591.pdfIn PDF document text
    • https://cdn.sqhk.co/tozegatopaxu/8tNj3Co/skullduggery_1983_full_movie.pdfIn PDF document text
    • https://xorodipilubila.weebly.com/uploads/1/3/5/3/135311864/viriko.pdfIn PDF document text
    • http://shoop-fp.ru/kevokogiijnp.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/fivebo/zodez.pdfIn PDF document text
    • http://wififeju.atwebpages.com/digital_signal_processing_lab_manual_vtu.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/panasuruxi.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/vixogazaliveg.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/xupob.pdfIn PDF document text
    • https://s3.amazonaws.com/nakuzafol/dorozowebalilagararux.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/63869897499.pdfIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/maxutudubowa.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_off0000d8dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8DC 5764 bytes
SHA-256: fe3b73774e1d1280a8e8cff5eb08ad354c49bb8ee521ea3714289ec96271ee0c
font_01_sfnt_off0000ec6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6E 10652 bytes
SHA-256: 33fba5da783f3cf6e94a975faa46813c23f39ab89eb4707518a326ad9c009d67

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