Malicious PDF — malware analysis report

Static analysis result for SHA-256 63c6c98fa366d488…

MALICIOUS

PDF

75.1 KB Created: 2021-02-28 02:48:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 9f9ee03dca84bc74e04d87d7f120a32e SHA-1: b25e6c2d1819b261f4d0b49c13e8b42e46241137 SHA-256: 63c6c98fa366d4881ff26f74cc467976921dc2a7fb77670ea9a6fc57ba38db6e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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. It contains numerous external URIs and embedded URLs pointing to disposable domains, suggesting a phishing or malware distribution scheme. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating the PDF acts as a link farm on potentially malicious hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jumiwimov.ru/strik?utm_term=powershot+stapler+not+working PDF link annotation
    • http://xejopegig.mypressonline.com/gebop.pdfIn PDF document text
    • http://fujigukatujewu.medianewsonline.com/namulazufige.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378382/normal_601105425f2dc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496818/normal_5fe3efda355b9.pdfIn PDF document text
    • https://zefugomifavo.weebly.com/uploads/1/3/6/0/136087281/8bb514bc7.pdfIn PDF document text
    • http://fuvisetitisenon.mypressonline.com/how_to_remove_totaline_thermostat_from_wall.pdfIn PDF document text
    • http://jaralet.getenjoyment.net/26119154228.pdfIn PDF document text
    • http://ig-objectionform.com/8320590476717iev.pdfIn PDF document text
    • https://vebogeperudibot.weebly.com/uploads/1/3/1/4/131455328/gafewezu-gefaguxivulefox-tokujekopixez-namawotero.pdfIn PDF document text
    • http://zanovekolasin.mywebcommunity.org/buzadizo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488817/normal_5fcb6d5c804b1.pdfIn PDF document text
    • https://gafepodaxo.weebly.com/uploads/1/3/4/6/134606739/8613277.pdfIn PDF document text
    • http://helpcontactform.com/75709838601g6bcx.pdfIn PDF document text
    • https://kikebepuziji.weebly.com/uploads/1/3/0/7/130775256/6528614.pdfIn PDF document text
    • http://manthoughtswebsite.website/xezusazaxokafurekesomepda6sp.pdfIn PDF document text
    • http://likedizar.medianewsonline.com/niveles_de_prevencion_salud.pdfIn PDF document text
    • http://sportita.fun/jenazukupajipejijetezutb2wid.pdfIn PDF document text
    • http://lotto-investclub.com/polunoziwufifubogatmjav2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e9be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9BE 5236 bytes
SHA-256: 0e058b985645271570557c11ee4ac0e83bd9e1a67f52f91aa17d3e4edad4de58
font_01_sfnt_off0000fb9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB9F 10424 bytes
SHA-256: 6ffb877eed1603aabfe9450efd83585987e84483e54fc6ae9fe392bfea140fa1

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