Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd0d6f96a0644637…

MALICIOUS

PDF

84.4 KB Created: 2021-02-26 21:47:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: be37e35890938dc46dfa1c096ca30f8f SHA-1: 884b7f68079a3ad0ada169679d7931efc4ee5c59 SHA-256: cd0d6f96a064463759a1c90259d9ea322d5e885e1c9afaf5bf666d4e0a31cd01
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and is flagged by multiple heuristics as malicious, including a high ML score and ClamAV detection. The document body, though partially corrupted, suggests a lure related to 'baby and dog gates', likely a pretext to drive traffic to the embedded URLs. The presence of numerous external URIs and link farm characteristics indicates a phishing or redirection attempt.

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://vilenefex.ru/wb?keyword=best%20baby%20and%20dog%20gates PDF link annotation
    • http://remeik.ru/apology_email_to_client_templaterwcb3.pdfIn PDF document text
    • http://bosupena.iblogger.org/gebedorisukusepafupaxiwar.pdfIn PDF document text
    • http://activa-fb.com/976944761524bp3a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414701/normal_5fef791e4241c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366665/normal_600d161271b9d.pdfIn PDF document text
    • https://cdn.sqhk.co/mopewedote/jiAgjij/endless_night_drive.pdfIn PDF document text
    • https://cdn.sqhk.co/xerejijasoma/Ujfgehd/17521473400.pdfIn PDF document text
    • http://revilokepudidu.mygamesonline.org/netters_anatomy_flash_cards_online.pdfIn PDF document text
    • http://dress-russia.ru/73391432912xzshs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454306/normal_600fb631212de.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
    • https://s3.amazonaws.com/purawuma/10393879226.pdfIn PDF document text
    • http://tajomum.epizy.com/76020285772.pdfIn PDF document text
    • http://xejefexevopu.epizy.com/16833251703.pdfIn PDF document text
    • https://s3.amazonaws.com/gonima/27353506613.pdfIn PDF document text
    • http://noworevapetero.epizy.com/divibobifeliputixonax.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/chrysler_grand_voyager_2003_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/lorugipopuxe/animales_de_la_selva_peruana.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_off0000fc60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC60 4896 bytes
SHA-256: ba3cb055d76650c1dcdce37bf9c9b998c7b545cc70445862cca3d39311277b65
font_01_sfnt_off00010d18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D18 11948 bytes
SHA-256: a3bf6d67a50e42e92359db6d12164c0ef010915ce1e2179c8b0779b0ecf35ac2
font_02_sfnt_off000134a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134A4 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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