Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7392cd7088007c3…

MALICIOUS

PDF

75.9 KB Created: 2021-02-22 01:57:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 6467c72eef744fce10881bcaeb49cc42 SHA-1: 90eb9a07d64e16508a42ddbefc21e1056fe5fc8a SHA-256: f7392cd7088007c37cca862993885ca05a0bb00438053b2781a7b1a389f7d4ab
126 Risk Score

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 0.9997

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://leonvi.ru/wix?keyword=lightning+stone+kingdom+hearts PDF link annotation
    • https://reseviris.weebly.com/uploads/1/3/5/4/135400779/ff9dd.pdfIn PDF document text
    • https://zudamuberul.weebly.com/uploads/1/3/4/8/134854759/2f79fc24e9e.pdfIn PDF document text
    • https://wojedebaroz.weebly.com/uploads/1/3/1/6/131637691/nuzovu_rewumefaro_vedola_zonubuzalaraji.pdfIn PDF document text
    • https://kitafawavan.weebly.com/uploads/1/3/4/7/134702073/2de919.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492575/normal_5ffb3055f1b43.pdfIn PDF document text
    • https://direwuberegenis.weebly.com/uploads/1/3/4/3/134361890/8cb6586c068bc.pdfIn PDF document text
    • https://meverelalopabij.weebly.com/uploads/1/3/4/1/134108836/rapigirumejex_keboxaza_xezimuxokeguxu_notuja.pdfIn PDF document text
    • https://mavezuwunokil.weebly.com/uploads/1/3/4/6/134627141/bomidabosovineton.pdfIn PDF document text
    • https://cdn.sqhk.co/gixekoji/Wj1gfhf/7219618803.pdfIn PDF document text
    • http://tajopujamelupa.22web.org/lista_de_verbos_irregulares_y_regulares_en_ingles_en_pasado_simple.pdfIn PDF document text
    • https://cdn.sqhk.co/posebozej/MAjf2Gn/sweet_fruit_pop_match_3_puzzle.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374376/normal_602421807575f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420910/normal_5ffb92eaa41d0.pdfIn PDF document text
    • https://kisewosa.weebly.com/uploads/1/3/1/0/131070890/xenaj.pdfIn PDF document text
    • https://cdn.sqhk.co/bovavadas/K9gff83/red_45l_hero_2._0_backpack.pdfIn PDF document text
    • https://zugasemoz.weebly.com/uploads/1/3/4/5/134593751/noxebamil.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tijelide.rf.gd/duwedugulumino.pdfIn PDF document text
    • http://suginuzebaluwom.rf.gd/vidhi_international_law_commission_internship.pdfIn PDF document text
    • http://kavimefejemud.rf.gd/notacion_cientifica_ejercicios_online.pdfIn PDF document text
    • http://popaxaxi.epizy.com/suwiwatuma.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_off0000e06a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE06A 3640 bytes
SHA-256: 6c515bf05ceff30f57cf993d055aabfa773d97475cf0df456ca769a90aaad606
font_01_sfnt_off0000ed45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED45 5212 bytes
SHA-256: 5c69532edfcd0449c466a9ed128875008ac676a4e6baecf96859a458a08d4333
font_02_sfnt_off0000fed7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED7 10336 bytes
SHA-256: 68914affa15a6d2a2e1b50a3a7e8500bf99f8f49546346ef631e91b2beecb0a9