Malicious PDF — malware analysis report

Static analysis result for SHA-256 2468e016e49460c5…

MALICIOUS

PDF

80.9 KB Created: 2021-03-28 17:22:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: a3e69a574ad38627a9e03884b6cb790c SHA-1: b0841771681c46d9e3c0f2574f210853adc51b2b SHA-256: 2468e016e49460c56c2313edd6e616bc8f594789af9bbb85567f38dec7a2d421
166 Risk Score

Malware Insights

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

The PDF contains multiple heuristic firings indicating malicious intent, including random and disposable URLs, and is flagged by ML classifiers and ClamAV as a phishing/trojan. The embedded URLs, such as http://rezonansmusic.com/nuxagubasometasizabotonirpcakt.pdf, are likely used to redirect users to malicious sites for further exploitation or credential harvesting. The document body, though heavily obfuscated, suggests a lure related to templates or agendas.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://dugedepap.ru/123?utm_term=all+hands+meeting+agenda+template PDF link annotation
    • http://palopej.sportsontheweb.net/12_bar_blues_guitar_chords_easy.pdfIn PDF document text
    • https://cdn.sqhk.co/wogokodu/hcwieja/best_free_ringtones_for_android.pdfIn PDF document text
    • https://cdn.sqhk.co/kinanekoxo/XgeS9UK/dilapaporezapafibiziz.pdfIn PDF document text
    • http://onlinekartiadesi.com/tewebusinasujezapuvidcq4mc.pdfIn PDF document text
    • http://copyright-services-us.com/prioritization_delegation_and_assignment_4th_edition_reviewsd68vt.pdfIn PDF document text
    • http://moneymaya.site/jesunotunazokf9o1.pdfIn PDF document text
    • http://derewopenila.22web.org/new_hunger_games_book_paperback.pdfIn PDF document text
    • https://cdn.sqhk.co/pebekaja/gjhidgi/goat_simulator_xbox_one_trophy_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/lawikuto/gcjjbha/76357879787.pdfIn PDF document text
    • https://cdn.sqhk.co/fesoxuleri/f2cktii/213133309.pdfIn PDF document text
    • https://cdn.sqhk.co/kujexelorite/Hhhz1iI/disaster_alert_app_android.pdfIn PDF document text
    • http://lebedugipul.mywebcommunity.org/andrew_cardwell_rsi_book.pdfIn PDF document text
    • http://gikodarekegov.mywebcommunity.org/complications_in_anesthesia_3rd_edition.pdfIn PDF document text
    • https://cdn.sqhk.co/tokokoxisuf/jiaGZLK/asch_conformity_experiment_ethical_issues.pdfIn PDF document text
    • http://thecabinets.xyz/what_is_loki_in_thorytbaf.pdfIn PDF document text
    • https://cdn.sqhk.co/zadoweferoxe/dygMja5/street_food_cooking_chef_pizza_burger_restaurant_texas.pdfIn PDF document text
    • http://menformula.xyz/57758719075pmp2u.pdfIn PDF document text
    • http://de-bewertung-889562.icu/4093061150023a6a.pdfIn PDF document text
    • http://bigigog.22web.org/11541136611.pdfIn PDF document text
    • http://reduslim-shop.website/download_parkour_rush_pvp_mod_apk4zt5w.pdfIn PDF document text
    • http://rezonansmusic.com/nuxagubasometasizabotonirpcakt.pdfIn PDF document text
    • https://cdn.sqhk.co/jeforije/ejdBhdF/65028120661.pdfIn PDF document text
    • http://mmmuuuue.space/42853613735mfkjt.pdfIn PDF document text
    • http://o-karte-kopilka.com/92696197629hglu1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://ruxujuzeto.rf.gd/capitec_bank_statement.pdfIn PDF document text
    • http://zafemozajurux.rf.gd/hp_elitebook_folio_9480m_i7_price_in_bd.pdfIn PDF document text
    • http://pitigapevede.onlinewebshop.net/structure_de_la_cellule_animale_et_vgtale.pdfIn PDF document text
    • http://dozodikud.epizy.com/crayola_calligraphy_practice_sheets.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_off0000f16f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF16F 4944 bytes
SHA-256: a14c84f3a2f8e141729b78895ef0b128219d994f8b12c094b28176fb0a2715ad
font_01_sfnt_off00010208.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10208 11060 bytes
SHA-256: e34343b7f40c2804dbe89e726b5bd23a67246a0519508803d37b4dddb52cfb14
font_02_sfnt_off0001276e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1276E 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176