Malicious PDF — malware analysis report

Static analysis result for SHA-256 c48f7d5e091ffd9b…

MALICIOUS

PDF

80.8 KB Created: 2021-03-15 06:25:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: feeeb5453ad75bbff5f26cb552bf9a9c SHA-1: aec2243de12f1f3a6671be4ac681c1bcd755642f SHA-256: c48f7d5e091ffd9b3afa1321d2d0987df3150de9f99cefd71705491adff39ec0
126 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs and is flagged as a link farm on disposable hosting, suggesting it's designed to redirect users to potentially harmful sites. The presence of embedded URLs and the PDF structure point towards a phishing or malware distribution attempt, likely using JavaScript to facilitate the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://resalured.ru/123?utm_term=adobe+color+profiles++mac PDF link annotation
    • https://xabetidadema.weebly.com/uploads/1/3/1/3/131398123/1eeb24b935f38e.pdfIn PDF document text
    • http://hocostyle.ru/what_is_fiqh_in_islam_in_englishpr1hs.pdfIn PDF document text
    • http://starconflict-game.ru/12305788237ttq5v.pdfIn PDF document text
    • http://fbcopyright-center.com/vegetarian_diet_for_weight_loss_meal_planeq4sr.pdfIn PDF document text
    • https://mizabago.weebly.com/uploads/1/3/5/2/135299272/60dccff8cc40a9.pdfIn PDF document text
    • https://luzusuzure.weebly.com/uploads/1/3/0/7/130775685/38b36189c6595.pdfIn PDF document text
    • https://dezegumi.weebly.com/uploads/1/3/4/1/134108828/zagivajag.pdfIn PDF document text
    • https://xupugafowepeg.weebly.com/uploads/1/3/0/8/130814457/gofituni-tizen-xifojadufalu.pdfIn PDF document text
    • http://vehicleusains.com/how_to_change_rockwell_versacut_saw_bladeg2vze.pdfIn PDF document text
    • https://cdn.sqhk.co/kewixoretuze/iciihjT/speedy_cash_online_customer_service.pdfIn PDF document text
    • http://repair-foto.ru/takilizixofape4wbnm.pdfIn PDF document text
    • http://najisemure.medianewsonline.com/apc_smart_ups_2200_battery_charge_lights_flashing.pdfIn PDF document text
    • http://hisgohar.site/bluecoat_wollaton_school_uniformae62v.pdfIn PDF document text
    • http://sdorovie-sustavi.xyz/anatomia_de_cabeza_y_cuello_para_odontologos_gratise3a0s.pdfIn PDF document text
    • http://mujabelor.mywebcommunity.org/fuginazotepulakuzedelo.pdfIn PDF document text
    • http://pofuxubilet.sportsontheweb.net/how_to_stretch_honda_ruckus.pdfIn PDF document text
    • https://cdn.sqhk.co/navimoxa/ctamihy/wordbrain_2_school_level_1-_5.pdfIn PDF document text
    • http://xosubowavenu.mypressonline.com/sigutigevanewavimarezoxej.pdfIn PDF document text
    • https://cdn.sqhk.co/xixujipum/fJK6gj8/20666475977.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/859635e0-cfab-4d11-8a73-f1fb50d30fb6/how_to_use_my_little_steamer_900_watt_deluxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67860f6f-8117-4d33-90be-bd0de25d9740/50529940327.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a16d1f10-b0ec-4363-abb6-dfa5935b1a3c/how_to_use_cricut_design_space_with_expression_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f1669f0-96a0-425a-9223-12513cc3671d/kokipumezajeli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/243f51c0-746c-4c9f-b6f8-5bbe784bf123/dilekolemejebobokupuv.pdfIn PDF document text
    • http://xolavozezimodan.onlinewebshop.net/mordheim_rules_part_2.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e987.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE987 5432 bytes
SHA-256: 8668c786cf20bcd85812ea038ff450d4438c69c24e13d9f28021d9f460472548
font_01_sfnt_off0000fbe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE1 10728 bytes
SHA-256: b0d0bf3b70387a9caa1ed958688fb84cff9a34bcb73cfa9bb301f4160530fb81
font_02_sfnt_off000120c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120C7 16060 bytes
SHA-256: d1a84ba8f0e4a827a048d387db8dd5dae3538f1c7e72415b16af587a9947cdc7