Malicious PDF — malware analysis report

Static analysis result for SHA-256 9504eb2a43aca504…

MALICIOUS

PDF

106.7 KB Created: 2021-03-31 07:39:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 62ad27a7f28e8c5b6cf49edc32cdfaa1 SHA-1: 92768a499b2bb55c39aadb8c23a7d11d43ef4f29 SHA-256: 9504eb2a43aca504663e4abe60c0b4c2e05d1f3264917c69d2ed9724569f152f
134 Risk Score

Malware Insights

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

The PDF document is detected as malicious by ML classifiers and ClamAV, and exhibits characteristics of a phishing lure. It contains embedded URLs, one of which is associated with a link farm on disposable hosting, suggesting an attempt to redirect users to malicious content. The document body, though partially corrupted, indicates a lure related to visa applications, aligning with the 'Fake invoice / payment lure' heuristic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/123?utm_term=australian+tourist+visa+checklist+form+philippines PDF link annotation
    • https://cdn.sqhk.co/nexuliwadi/Ubgckhh/bazuzira.pdfIn PDF document text
    • http://saxefitipar.iblogger.org/korean_anti_aging_sheet_mask.pdfIn PDF document text
    • https://cdn.sqhk.co/pifajaloro/e4igg43/nascar_texas_race_time_today.pdfIn PDF document text
    • https://cdn.sqhk.co/woxipepevati/vgfvCUV/47904375466.pdfIn PDF document text
    • https://cdn.sqhk.co/tukawezezo/Kifghib/81800466251.pdfIn PDF document text
    • https://cdn.sqhk.co/zelagagunogo/Ihawejf/gunababagumopus.pdfIn PDF document text
    • http://dabejorugorazom.22web.org/weather_report_in_hucknall.pdfIn PDF document text
    • https://cdn.sqhk.co/dajebala/PjiwCxR/cash_app_refund_request_denied.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://551f0ad2-75d1-4009-b90b-2f3e3e20230b.filesusr.com/ugd/c2bf0a_b77c3475a5c641599f2c9d48b7380239.pdf?index=trueIn PDF document text
    • http://fivulesesixiji.epizy.com/bmth_wallpaper_android_hd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8096b99a-bb5a-4e04-a14e-68e77ed51f89/99583782158.pdfIn PDF document text
    • https://6c8ebe11-725c-420b-823a-68bc39d02ad2.filesusr.com/ugd/3e87bf_d1a4fd37144b43c1bed0dde0b2d200a3.pdf?index=trueIn PDF document text
    • http://pizenove.epizy.com/vuzefos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e21ef073-8b60-4bb0-a785-71070479f77e/21134186662.pdfIn PDF document text
    • http://tosivasode.epizy.com/11950826027.pdfIn PDF document text
    • http://riwugenesujo.epizy.com/nudidupifox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e852acf-c806-4db4-aabd-60e26231482a/14269304756.pdfIn PDF document text
    • https://7c3dd69e-6649-485e-b385-36acc2971cd6.filesusr.com/ugd/cf9ff1_308aeb44aef8464187e259c471d58016.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a4329de-0ada-4c85-9445-a6e08fc0efb1/papanomipik.pdfIn PDF document text
    • https://0ddd2631-58c7-464c-86d0-a5d1d8121c04.filesusr.com/ugd/301b85_d6310dd511b64475bfdfb50e22731311.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d66c07dc-94b6-45b4-b1cf-97ecb87976b1/how_to_hard_reset_nook_glowlight_3.pdfIn PDF document text
    • http://pevivudawof.epizy.com/sony_nxcam_hxr-nx100_specs.pdfIn PDF document text
    • http://ferurexage.epizy.com/iti_admission_form_haryana.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_off00015630.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15630 5252 bytes
SHA-256: 0c744e6a8677937b3c50d6744e462a440f06238c5896ed8d2e5dd44e5c28775e
font_01_sfnt_off000167de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x167DE 11500 bytes
SHA-256: 396a7245c674bc0e1b4be9ee482d8a94e31c7e0c1ce2bdf5468de80b4aab94c4
font_02_sfnt_off00018e68.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18E68 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3