Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a82073c4d10a24f…

MALICIOUS

PDF

72.0 KB Created: 2021-03-01 13:50:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: f14450d276ea228f9ca148f3c7c6d2aa SHA-1: 7a892cb305b256bebac381ee4fb8bb3b9dabbaf2 SHA-256: 9a82073c4d10a24f32173fad272edbaa891254d4470c01ff97a9a9a959ce7fee
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The presence of embedded JavaScript, though not directly analyzed for specific actions, is often used in malicious PDFs to exploit vulnerabilities or redirect users to malicious 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
  • 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=manually+open+toro+sprinkler+valve PDF link annotation
    • http://fortuneocredit.com/nix_8_inch_usb_digital_picture_framebdbno.pdfIn PDF document text
    • http://bumasujofoj.getenjoyment.net/21778569187.pdfIn PDF document text
    • http://koxelovanalimu.getenjoyment.net/sirutefeladisavekitovud.pdfIn PDF document text
    • http://wivevadevenumet.mywebcommunity.org/how_to_do_the_pascal_triangle.pdfIn PDF document text
    • http://english-10.site/dream_a_little_dream_of_me_sheet_musunrx8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369633/normal_5fddfe7c599af.pdfIn PDF document text
    • http://mifvideo.space/ccna_routing_labspyp6e.pdfIn PDF document text
    • http://startask.ru/65062687362q4t8j.pdfIn PDF document text
    • http://lulezuzebat.22web.org/liftmaster_elite_series_3800pld_garage_door_opener.pdfIn PDF document text
    • http://honey-love.ru/carmax._com_car-_buying-_process_recall-_faqx1h0q.pdfIn PDF document text
    • http://sendgrid-de.com/jemegitidubapo5febi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388173/normal_60265e791bad3.pdfIn PDF document text
    • http://qrastenmap.online/girijegibums8dnw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461780/normal_5fe9da7a892db.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://virefixifefuke.epizy.com/lizilatamobatu.pdfIn PDF document text
    • http://sapirabiv.rf.gd/najijabuzasamaxet.pdfIn PDF document text
    • http://silonerufaxobo.epizy.com/24111970684.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_off0000de96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE96 5044 bytes
SHA-256: d506ec9eba73702d87fbf43c3c24387a6e9cfe43413187a3e8810516924aa46f
font_01_sfnt_off0000efe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE9 10280 bytes
SHA-256: 934c3d185719e5d8bb1def19796e591a77c667173fc1547c03169f47b7ea3368

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