Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cb6b82dc50ba5d1…

MALICIOUS

PDF

73.6 KB Created: 2021-02-26 22:46:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 83aaa883d08755ddb0ff57f9e81772ec SHA-1: d066f004fbd4576a81569da3889bcf54b453b27b SHA-256: 9cb6b82dc50ba5d1782d9577c5fc68badf9d590bb12d05aa2517f36a13ef29ec
126 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution attempt, likely leveraging embedded JavaScript for malicious actions.

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 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=tekonsha+primus+iq+installation+instructions PDF link annotation
    • http://davupopebuwiser.sportsontheweb.net/no_matter_the_wreckage_free.pdfIn PDF document text
    • http://didavixakodix.22web.org/60519513131.pdfIn PDF document text
    • https://zebotulebile.weebly.com/uploads/1/3/6/0/136052074/4427de766d88.pdfIn PDF document text
    • http://tupaxeguna.scienceontheweb.net/sisowonu.pdfIn PDF document text
    • http://tafugegajotu.mygamesonline.org/how_to_use_maschine_mk3_as_midi_controller.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422390/normal_60082d794a130.pdfIn PDF document text
    • http://pofuxubilet.sportsontheweb.net/364183122.pdfIn PDF document text
    • http://gukiduwonaxinef.getenjoyment.net/john_deere_l108_automatic_price.pdfIn PDF document text
    • http://gowanenutik.mypressonline.com/pakaserejimeripod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466411/normal_5fe61d0b3686e.pdfIn PDF document text
    • http://tufepuwaw.iblogger.org/flipbook_animation_ppt_template.pdfIn PDF document text
    • https://rubitolagaju.weebly.com/uploads/1/3/5/3/135330326/tokofasunupeli.pdfIn PDF document text
    • http://vazawujuzu.sportsontheweb.net/stevie_wonder_journey_through_the_secret_life_of_plants_album.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://zotinulimoruv.rf.gd/88033109110.pdfIn PDF document text
    • http://zudupaxub.myartsonline.com/babazona.pdfIn PDF document text
    • http://kofaxafogi.myartsonline.com/57844966455.pdfIn PDF document text
    • http://lojabupabavize.onlinewebshop.net/piriformis_syndrome_exercises_and_stretches.pdfIn PDF document text
    • http://weralawubuzeg.epizy.com/widukud.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_off0000d642.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD642 5192 bytes
SHA-256: 2acf632fb63431e96f2f10961df84d6d6a31247039eacde1b49e65359a7b9b40
font_01_sfnt_off0000e7ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7CA 10268 bytes
SHA-256: 83c9ca30b4d63f30ad127d6f8129039ac0896a98831459d590624f47431d9345
font_02_sfnt_off00010af5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF5 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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