Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe8317cf506ab366…

MALICIOUS

PDF

77.5 KB Created: 2021-03-08 23:50:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: bea84336f752ab4e291d02e8edad54f2 SHA-1: 65328e952b69958c81aa522b6cc18d3c8c8e46fa SHA-256: fe8317cf506ab366ce9810e23cfa9319681b388236630670b86df09faeeda107
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://gimoguvi.ru/123?utm_term=always+on+display+apk+pro PDF link annotation
    • https://gozaperirij.weebly.com/uploads/1/3/1/1/131163841/fowinenagefazexezutu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412415/normal_602db5194cbd3.pdfIn PDF document text
    • https://waderiraxobo.weebly.com/uploads/1/3/4/5/134505054/3499751.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421200/normal_602c67412a2a4.pdfIn PDF document text
    • http://podifodosej.scienceontheweb.net/atomic_habits_audiobook_free_online.pdfIn PDF document text
    • https://cdn.sqhk.co/lebogomatoze/hemqNDQ/2449615746.pdfIn PDF document text
    • http://nariwunuzaw.scienceontheweb.net/mgma_physician_income.pdfIn PDF document text
    • https://cdn.sqhk.co/marixefe/cFii8qa/direpa.pdfIn PDF document text
    • http://fulukegoror.getenjoyment.net/how_to_connect_hp_airprint_to_iphone.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418970/normal_6012a297e0fd1.pdfIn PDF document text
    • https://surugatolezijef.weebly.com/uploads/1/3/4/6/134631687/zixajinemoga_zujomoda_kasefelunoj.pdfIn PDF document text
    • http://momarivido.mypressonline.com/ti_nspire_cx_usb_cable.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465924/normal_60275d0bda8ba.pdfIn PDF document text
    • http://nomevufaneboja.mypressonline.com/what_can_i_do_with_a_masters_in_exercise_physiology.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425772/normal_5ff571a15e383.pdfIn PDF document text
    • http://fovikoxesaweziz.medianewsonline.com/computer_architecture_and_organization_by_john_p_hayes_tata_mcgraw_hill_1996.pdfIn PDF document text
    • https://cdn.sqhk.co/nomelafu/GPyieji/pictoword_level_58.pdfIn PDF document text
    • http://lodomujimujug.mywebcommunity.org/kaliniditenopamuwu.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/6616abc5-94c5-4091-9534-118b2daced93/when_is_harry_potter_5_illustrated_coming_out.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c25b459-1cec-45a3-ac0e-9dd96f59b7d9/81491597439.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_off0000f103.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF103 5200 bytes
SHA-256: d03c658098b7ce4ca66becca9b79f81215f7de148c1ac5ce3c3b6dbded2066cd
font_01_sfnt_off000102da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102DA 10952 bytes
SHA-256: 94ea9ad324b6bed7a4dff3315ac908759c99504dfe18ffd68321bc2489697a80

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