Malicious PDF — malware analysis report

Static analysis result for SHA-256 20369733bcdfdc83…

MALICIOUS

PDF

70.0 KB Created: 2021-03-05 05:02:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c3519f16ca8e0e24aafa8bab9e5a1fdf SHA-1: 25ef04e3a6d44b0c17f00af68551bb2531ded95e SHA-256: 20369733bcdfdc8320bd18ad33ccaba87b796a8296ba60a7f5f7effde1053546
126 Risk Score

Malware Insights

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

The PDF contains numerous external URLs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful 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://ponafet.ru/123?utm_term=d+and+d+building+wallpaper PDF link annotation
    • http://zootime.store/daniel_fast_weekly_meal_planning_sheetc1guc.pdfIn PDF document text
    • https://cdn.sqhk.co/rudixika/Bhajbha/golelomi.pdfIn PDF document text
    • http://masajsalonunuz.com/simojebalijuwigadakaram3ut4z.pdfIn PDF document text
    • http://medicalpracticementor.com/notapibetunak7kkbs.pdfIn PDF document text
    • https://cdn.sqhk.co/denirinodo/ggaiege/icon_clash_logo_leggings.pdfIn PDF document text
    • https://cdn.sqhk.co/vilitemeru/KQ9MhcY/86495956968.pdfIn PDF document text
    • http://shopee24.site/memopumunamerumezobutseryy.pdfIn PDF document text
    • https://cdn.sqhk.co/doparibi/eMGtkfw/world_cup_2022_asia_qualifiers_points_table.pdfIn PDF document text
    • http://my-credit.info/baburao_bagul_booksd4sh0.pdfIn PDF document text
    • https://cdn.sqhk.co/zarepowake/djcjIKC/25612466601.pdfIn PDF document text
    • http://best-store.club/fastest_way_to_pass_security_exam8g6a8.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://uploads.strikinglycdn.com/files/e0f5a2e1-3e5e-4ac9-9974-55c1a2c6248c/fejewe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6fcc129-ca6d-47aa-983b-b4d3b8290f4f/79052732891.pdfIn PDF document text
    • http://kukalofawofami.epizy.com/verizon_wireless_jetpack_login.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7022e17-10ca-489c-a495-0cbdcee67aa8/bengali_to_english_dictionary_app_download.pdfIn PDF document text
    • http://tawadamaripiz.rf.gd/how_do_you_fix_a_samsung_galaxy_s6_edge_that_wont_turn_on.pdfIn PDF document text
    • http://jokabaj.epizy.com/lights_on_tour_2019.pdfIn PDF document text
    • http://fofilelajisemap.rf.gd/insinkerator_installation_video.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_off0000ca2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA2E 4872 bytes
SHA-256: 734b05cee33dc07631897e5b3aed4bf82b5e920e05195dd331e1d35232353fa5
font_01_sfnt_off0000dac5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC5 10164 bytes
SHA-256: dddbd7f14c833df71c5da9fd8f9c854d682de6df87c5b28a65a3254cff944bb4
font_02_sfnt_off0000fcf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF5 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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