Malicious PDF — malware analysis report

Static analysis result for SHA-256 465de59b98d7fa8b…

MALICIOUS

PDF

91.9 KB Created: 2021-03-26 10:52:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: d9c443984f1c6429507586751e062324 SHA-1: 7822db8b7068f6e450973c483d2c82aad89f672c SHA-256: 465de59b98d7fa8b13bc1538316d715e509cc9e47463b92965672843dc7dd616
166 Risk Score

Malware Insights

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

This PDF document contains multiple heuristics indicating malicious intent, including suspicious links and ML classification. The document body, though heavily obfuscated, suggests a lure related to a 'ccna wireless official exam certification guide'. The primary malicious URL identified is http://ig-supportcenter.xyz/jajusuwepapefuzeuo88c.pdf, which is presented as an invisible link within the document. The presence of external URIs and the overall structure point towards a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://nipisod.ru/award?keyword=ccna+wireless+official+exam+certification+guide+pdf PDF link annotation
    • http://ig-supportcenter.xyz/jajusuwepapefuzeuo88c.pdfIn PDF document text
    • http://help-verification.com/safizexarthqr.pdfIn PDF document text
    • http://vitofemegawe.getenjoyment.net/agenda_21_summary.pdfIn PDF document text
    • http://tebafurunaxinuj.getenjoyment.net/xaraluvotagilibatunajowe.pdfIn PDF document text
    • https://benukozememig.weebly.com/uploads/1/3/4/4/134480731/4839b83071e7.pdfIn PDF document text
    • http://shtangelkipokupkiitd.online/68623569486isnba.pdfIn PDF document text
    • http://desokore.medianewsonline.com/puraguna.pdfIn PDF document text
    • http://helpcenterbusiness.xyz/adobe_premiere_pro_free_download_full_version_for_pc_windows_7kao8g.pdfIn PDF document text
    • https://wetegawufuju.weebly.com/uploads/1/3/5/3/135302163/7905741.pdfIn PDF document text
    • http://idealicaitaly-ufficiale.site/ruwuxajebovinang0c9a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jimomurapujivo.onlinewebshop.net/convert_cdr_to_software_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fbee4a3-a146-4377-a9b6-904a78015bc4/how_to_set_up_total_gym_fit_plus.pdfIn PDF document text
    • https://9e730ba1-499c-413e-9a09-8a81f8121270.filesusr.com/ugd/0a0016_0e3e26d566fe46c7a51157839f9597ff.pdf?index=trueIn PDF document text
    • http://mewabetowa.myartsonline.com/agricola_family_edition_solo_rules.pdfIn PDF document text
    • https://144c9d4d-401b-437b-b89f-6a5816d7da47.filesusr.com/ugd/cd33f5_3913b622b6734858a1a50025dff067a3.pdf?index=trueIn PDF document text
    • https://ec5c17a1-061e-4a2c-a9e6-b3561ba71229.filesusr.com/ugd/299074_85b8316811914dadb7e487171eca474c.pdf?index=trueIn PDF document text
    • https://5b2b9875-3923-4577-9ef6-0527498c95e7.filesusr.com/ugd/4e6dd5_3d96edf6d45040e2b07ac84819dcaab7.pdf?index=trueIn PDF document text
    • https://f8bd9030-4518-40b4-9047-d478e6ffc17b.filesusr.com/ugd/608fe2_6f86a0ef85b241179a6838e30be74094.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/078b42fa-60a7-4fc5-88ab-7fd03782c43e/26961280628.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_off0001272f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1272F 5540 bytes
SHA-256: a6c3e6b732bc598c7d1971bc6f8018e0a2acad210b4a5cabc86db64be579194f
font_01_sfnt_off00013a0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A0A 11924 bytes
SHA-256: 0455a73de0c3c673a1070a0cacb3f8ef4f27cf08cd96493da36d5a1854f20662