Malicious PDF — malware analysis report

Static analysis result for SHA-256 c006085249252330…

MALICIOUS

PDF

77.5 KB Created: 2021-03-30 17:31:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 68eace4563cd99c7b1987e009ca2d3bd SHA-1: d160661d62e807f7a5ca124c5074d202c9b1639f SHA-256: c006085249252330d00ae3e756b13299f7f307b301a075a3f7d37b41ecfbbb7c
126 Risk Score

Malware Insights

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

The sample is a PDF document that contains numerous embedded URLs, many of which point to disposable hosting and are likely part of a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the PDF structure and embedded links suggest an attempt to trick users into visiting potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://soxebez.ru/award?keyword=left+displaced+abomasum+pdf PDF link annotation
    • http://jadebey-x.com/dunkin_large_caramel_iced_coffee_caloriesxc2c9.pdfIn PDF document text
    • http://wowogobofomufu.mygamesonline.org/98733724247.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413865/normal_5fd073a00e28e.pdfIn PDF document text
    • http://juwupexutaval.mywebcommunity.org/e_rickshaw_battery_charger_circuit_diagram.pdfIn PDF document text
    • http://pasikufopubiwo.mypressonline.com/43171037900.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476432/normal_60490711447b2.pdfIn PDF document text
    • http://mikovil.mywebcommunity.org/32282645034.pdfIn PDF document text
    • http://sigisuzuk.getenjoyment.net/terepirowilefoluz.pdfIn PDF document text
    • http://xumupizaxuto.scienceontheweb.net/bhagavad_gita_yogananda.pdfIn PDF document text
    • http://tulumiv.medianewsonline.com/assembly_language_programming_tutorial_point.pdfIn PDF document text
    • http://ductsunlimitedins.com/90650701249f4wii.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/48a58410-3a54-402f-a5d8-20a8595a3932/beren_ve_luthien_filmi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf84a88e-1b3e-44fc-8696-a5d0caa29c0f/paxisemifelefejam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/debd9d73-9ebb-4b3a-afbe-e463980767b6/pukigavafudunatewuzi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7a8d0bf-83f4-4649-8911-090b2ec792cf/lubivogomepu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c8225e4-4eee-425f-9182-0b72084871d1/87734781847.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/922d136d-7a2e-4dbb-bf0e-4ee03fff9605/25474733712.pdfIn PDF document text
    • http://masusoxowep.onlinewebshop.net/vulunanabetireronexoketep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78655582-d58e-4762-bf41-e06da94604cb/wikanesozimi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e20ae86e-9a9f-4015-879f-fce4a7214183/scytek_alarm_wiring_diagram.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_off0000f2b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B8 5284 bytes
SHA-256: a449fbf565753ad9f82ce3a243510c32b18b094c56fc94e18946c3ba08ab25e0
font_01_sfnt_off000104a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104A7 10708 bytes
SHA-256: bcad97303297173363ad222064c8b18b9a997637715fe2fb37b5f437da12e971

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