Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d9d237a23232177…

MALICIOUS

PDF

78.2 KB Created: 2021-03-27 10:30:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 8632062a3516d79690008123429a6d38 SHA-1: cb26b5873b7146f595900ebb45f364630ff0fc72 SHA-256: 0d9d237a23232177a894d883cf0b791906b83bf2b1f592d1190d1b05ceaaa6fd
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document was flagged by multiple heuristics as malicious, including a critical finding for linking to known malicious redirector infrastructure. The ML classifier also assigned a high probability of maliciousness. The document contains numerous embedded URLs, many of which point to disposable hosting or redirectors, suggesting a phishing or malware distribution scheme. No scripts were extracted, but the presence of malicious links indicates an attempt to lure users to external 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/wix?keyword=speed+velocity+and+acceleration+lab+answers In PDF document text
    • https://cdn.sqhk.co/zodozane/YiehiDt/89012870313.pdfIn PDF document text
    • https://cdn.sqhk.co/nurijodefa/ihjauif/jurassic_world_the_game_download_android_free.pdfIn PDF document text
    • http://garanibukumom.scienceontheweb.net/beginning_latin_poetry_reader.pdfIn PDF document text
    • http://sunakijabe.sportsontheweb.net/galozojutodaworiduv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418558/normal_602c49d9a6e63.pdfIn PDF document text
    • http://mikazuxo.mypressonline.com/aprender_coreano_gratis.pdfIn PDF document text
    • https://cdn.sqhk.co/vitikitema/ijg1NUq/91201631150.pdfIn PDF document text
    • https://cdn.sqhk.co/rapovebakeb/htsoVtA/garogif.pdfIn PDF document text
    • http://lifolibi.sportsontheweb.net/numekatoxu.pdfIn PDF document text
    • http://kiritisivasol.mywebcommunity.org/91444269626.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375196/normal_601b9fef4857c.pdfIn PDF document text
    • https://cdn.sqhk.co/xamewivuvus/hiOhjjb/ccie_service_provider.pdfIn PDF document text
    • http://kobodesuwid.getenjoyment.net/67995156340.pdfIn PDF document text
    • http://rixuliketasaban.mywebcommunity.org/cours_d_anglais_pour_dbutant_gratuit_en.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://tagijonegularol.myartsonline.com/zutulepumeju.pdfIn PDF document text
    • http://zowofiz.myartsonline.com/stihl_br_600_magnum_blower_parts.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e324.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE324 5352 bytes
SHA-256: 5b28e97276a1c4e1460555d75b9b2e3c64b5f4a6b61eb582136e829794421b7e
font_01_sfnt_off0000f56f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF56F 11268 bytes
SHA-256: db2e39de2d098462bc682a9108e0519163bcfd296260d855b3a6896b1210a18e
font_02_sfnt_off00011b7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B7D 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

Open this report in the interactive analyzer, or submit your own file for analysis.