Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2584cc67a841652…

MALICIOUS

PDF

85.4 KB Created: 2021-04-05 03:52:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 0eda55b8ea7036bc16aa8d7ea6959ab8 SHA-1: 025ce09e2e425e4a2e5eac520a763f075e77e000 SHA-256: c2584cc67a84165292fde37fc651703e45bfbd5622d4681905bb55aaaf70a5b9
126 Risk Score

Malware Insights

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

The PDF contains numerous links to disposable domains, many of which are flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to malicious content hosted on these domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://helplnstagramcontact6088756.com/skyworth_65_inch_uhd_infinity_android_tvf7agg.pdf In PDF document text
    • http://wejowadizabudex.mypressonline.com/mental_endurance_synonym.pdfIn PDF document text
    • http://mamafiposorugul.sportsontheweb.net/01_de_maio__feriado_mundial.pdfIn PDF document text
    • http://mujubow.getenjoyment.net/o_level_biology_5090_notes.pdfIn PDF document text
    • http://kataeta.club/tosatalasipoladafiup8x.pdfIn PDF document text
    • https://buvonage.weebly.com/uploads/1/3/0/9/130969236/mivowikepozodim_satonobonulam.pdfIn PDF document text
    • http://appletopshop.ru/lg_g2_one_click_root_xdaqrttg.pdfIn PDF document text
    • http://bobixina.getenjoyment.net/30451777026.pdfIn PDF document text
    • http://kanshoper.site/how_to_find_the_rhythm_in_a_poem0yq2a.pdfIn PDF document text
    • http://mukinumatonewo.getenjoyment.net/how_to_determine_the_number_of_atoms_in_a_formula.pdfIn PDF document text
    • https://rovoduwomu.weebly.com/uploads/1/3/5/3/135332400/f2419d832b0.pdfIn PDF document text
    • http://badgesverified.com/872260062813p8go.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/bVCGPfG74RQ/wb?keyword=how%20to%20reset%20your%20ge%20washing%20machinePDF link annotation
    • http://pejinubonuxus.epizy.com/whatsapp_2018_free_jio_phone.pdfIn PDF document text
    • http://pekafujojef.onlinewebshop.net/entrepreneurship_development_notes_for_bcom_1st_year.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bd30a43-850d-4f84-a91c-bcb879b1f9c5/11075706118.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4625e3a-121e-4d51-93af-97b311981572/garijugomoguruso.pdfIn PDF document text
    • http://sozejek.epizy.com/descargar_canciones_de_los_tucanes_de_tijuana_mix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2c177e3-af2e-44e5-824c-b3e0a0c22482/icharger_206b_firmware.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/181a77fe-899c-4ee8-a5d0-0310e0ee88f8/58372441342.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65dccc62-ca8d-451b-9871-fd0202fe5850/2501215766.pdfIn PDF document text
    • http://bijasubibivov.rf.gd/bootable_pendrive_windows_7.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_off00011265.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11265 5336 bytes
SHA-256: d463cbc5f91341742df3ccaca2d4c65113c22d5b863364278877d4a23b48c50d
font_01_sfnt_off0001247e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1247E 10432 bytes
SHA-256: 905d658abe23bbdffa0043b1c40e91219fe74670ce195bc97ffd3b58142b0b86

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