Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd5b5ccfd76a6a95…

MALICIOUS

PDF

80.4 KB Created: 2021-03-07 22:06:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 7bc87ede5394184220c2d0443e752190 SHA-1: 8768679801ed39d38daa87ab935edc4fee8ba6bb SHA-256: dd5b5ccfd76a6a950dc49309534858b30c7830ea832b67a69003a1209e1fc8e0
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for Pdf.Phishing.Trojan and an ML classifier indicating maliciousness. The document contains numerous embedded URLs, with at least one pointing to a domain associated with malicious activity ('fokemale.ru'). The presence of external URIs and link farm characteristics suggests an attempt to redirect users to potentially harmful content. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing or malware distribution lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 https://fokemale.ru/aws?utm_term=mcgraw+hill+education+answers+chemistry PDF link annotation
    • https://cdn.sqhk.co/pakiwujipubi/Oichezo/stick_war_legacy_mod_apk_for_ios.pdfIn PDF document text
    • http://pukebebizadolu.mypressonline.com/how_to_drain_lochinvar_water_heater.pdfIn PDF document text
    • http://ruwemipuwev.mypressonline.com/20732853112.pdfIn PDF document text
    • https://cdn.sqhk.co/zivupowixede/uUqOjhI/flag_boy_meaning.pdfIn PDF document text
    • http://tolejif.22web.org/alex_rider_stormbreaker_book_review.pdfIn PDF document text
    • https://cdn.sqhk.co/vivakawibaki/bhfhbgd/17373459729.pdfIn PDF document text
    • http://sifisomatexow.sportsontheweb.net/what_are_the_10_naeyc_standards.pdfIn PDF document text
    • http://muzibatixabu.mypressonline.com/36040172648.pdfIn PDF document text
    • http://gedirobidepud.scienceontheweb.net/56972684679.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pivujumurabaf.epizy.com/bangla_comedy_image.pdfIn PDF document text
    • https://22e365c6-0853-42e1-82f8-83473bf9c0bf.filesusr.com/ugd/217d68_194c5881dc8e4acf9e1e33f216fcacb8.pdf?index=trueIn PDF document text
    • https://64e18f06-8a0e-4dc1-8427-9dd81b4bff36.filesusr.com/ugd/baa514_e9532f541f48490db09ab694be5c4b2f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec9b3338-a573-4ba2-af7f-950cb5e9710b/23862641020.pdfIn PDF document text
    • http://pozimefenud.epizy.com/achievement_test_sample.pdfIn PDF document text
    • http://gofosuxubajo.epizy.com/taco_bell_chipotle_sauce_nutrition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cca908c6-99bb-4a82-94bd-e64bfa7fbce1/how_to_unlock_disabled_iphone_5s_without_computer.pdfIn PDF document text
    • https://c5e26362-acc3-4c40-9db4-ce0cbd355080.filesusr.com/ugd/681527_19cb9149053448fba7c6a57dc3b496f3.pdf?index=trueIn PDF document text
    • http://gevorewububew.epizy.com/codigo_politico_de_puerto_rico.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3964ffc8-1cd8-4953-9dc9-137f9135af36/najemixoloziguz.pdfIn PDF document text
    • http://sepuxukejobome.epizy.com/cambium_networks_epmp_force_180_manual.pdfIn PDF document text
    • https://979cd01f-16ea-4d2c-b189-234964c95597.filesusr.com/ugd/d4c4cf_041a18ea842e4fc0b253f93140806207.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3efd3470-2dc2-47f2-9bfc-92f6c93fd41e/hp_10bii_financial_calculator_tutorial_npv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22773de1-9f1c-46eb-aa21-e3c6e6fa6eac/takolekafinoroteganiwu.pdfIn PDF document text
    • https://e6f9d1db-9bad-45ba-a188-0e8e378e8087.filesusr.com/ugd/99b222_584035e5719842e887e55c2d7642d535.pdf?index=trueIn PDF document text
    • http://kazizalogovake.rf.gd/zigivufilapebadaduvegusoj.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_off0000fb9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB9E 5552 bytes
SHA-256: df7f7f2a6fe5cfd5a884f65d77d5bb73991ce93eff3528a9518da46351d0cbaa
font_01_sfnt_off00010e76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E76 10864 bytes
SHA-256: c347a647a84a53da68c283aafc2c24aae76cbc83e503e0e4a025b0f1cebff643