Malicious PDF — malware analysis report

Static analysis result for SHA-256 859b678eaed3e579…

MALICIOUS

PDF

74.8 KB Created: 2021-02-14 04:24:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: ad242dcc1b289ca87dc75205af4fa85d SHA-1: 1abbfdf20919c12da68a883ddbaeaa093b0ec11a SHA-256: 859b678eaed3e5799177e7a51092cedc34571a5e1030014688387ec9376e0ff1
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable or suspicious domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of an attempt to redirect users to malicious content.

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
  • 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://jacksth.ru/wix?keyword=underground+fat+loss+manual+free PDF link annotation
    • https://patapirebitogi.weebly.com/uploads/1/3/0/8/130814085/306918ca707276.pdfIn PDF document text
    • https://cdn.sqhk.co/duzoxibuf/hjtsRhe/download_go_to_car_driving_3_mod.pdfIn PDF document text
    • http://shop50off.info/pijaseleworakametebutokfktz.pdfIn PDF document text
    • http://pinixubezanamot.iblogger.org/julubatosapas.pdfIn PDF document text
    • http://vopibuxipem.22web.org/vokigivalabanepopunanat.pdfIn PDF document text
    • http://lnstagram-office.com/elite_motors_inc._kennesaw_ga_30152y9km2.pdfIn PDF document text
    • https://disaximineta.weebly.com/uploads/1/3/4/8/134883765/74e060767142931.pdfIn PDF document text
    • http://photoforce.ru/certificado_antecedentes_judiciales_policiayp21l.pdfIn PDF document text
    • https://vakinora.weebly.com/uploads/1/3/1/8/131857586/0b15a.pdfIn PDF document text
    • https://cdn.sqhk.co/satidaruxami/cxjikib/nail_art_and_spa_lowell_mi_prices.pdfIn PDF document text
    • https://gigadejelurare.weebly.com/uploads/1/3/0/8/130874533/130260.pdfIn PDF document text
    • https://cdn.sqhk.co/posojuvapono/jioihgh/58861403902.pdfIn PDF document text
    • http://guitar.su/crank_2_full_movie_free_download58ns8.pdfIn PDF document text
    • https://cdn.sqhk.co/sekeniti/KuZjep8/tiny_diamond_bracelet_etsy.pdfIn PDF document text
    • http://situbune.iblogger.org/47945331403.pdfIn PDF document text
    • http://dajumike.iblogger.org/gerisirupufidotanisumewe.pdfIn PDF document text
    • http://palitra-cveta.ru/world_car_racing_game_downloadifrg0.pdfIn PDF document text
    • https://mubuxepuvu.weebly.com/uploads/1/3/1/3/131383429/1900475.pdfIn PDF document text
    • https://venubitolaxi.weebly.com/uploads/1/3/4/3/134372432/6e5a00fdb3bfb6.pdfIn PDF document text
    • https://lodavoxi.weebly.com/uploads/1/3/4/5/134505118/9841068.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dofadedivuxira.rf.gd/best_worship_songs_video.pdfIn PDF document text
    • http://tedumadedin.epizy.com/72942106086.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_off0000e7b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B2 5220 bytes
SHA-256: d5692ed873b55a89612b13ffdf6f153ee72689ddb7c9cd2aefd23aeb77f843a3
font_01_sfnt_off0000f962.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF962 10596 bytes
SHA-256: e2c9e76c57e5bfe0dc2d149488293f3227d4da86df6556c5dd45118947c4e143

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