Malicious PDF — malware analysis report

Static analysis result for SHA-256 041d1b321a6584be…

MALICIOUS

PDF

80.1 KB Created: 2021-04-01 14:50:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f58360f243d3dc6d56450ebc3ea9ca42 SHA-1: b0a305d6f662e878c2b1a279ce3ac89e679d6a34 SHA-256: 041d1b321a6584be9a588c07e2a2de5ef66c7a10ef2271629efbb70479230446
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are associated with link farms, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to 'Gta 5 apk download', indicating a lure to trick users into clicking on the malicious links. ClamAV detection and ML classification further confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://kuzutuzo.ru/wix?keyword=gta+5+apk+download
    • http://gugezebaz.mygamesonline.org/zabakufen.pdf
    • https://static.s123-cdn-static.com/uploads/4454668/normal_5fff01745db23.pdf
    • https://cdn-cms.f-static.net/uploads/4368249/normal_602111ce537fa.pdf
    • http://healsmall.space/how_much_do_the_average_person_make_a_yearvgg3n.pdf
    • https://static.s123-cdn-static.com/uploads/4472208/normal_5fdecaa610da1.pdf
    • http://bavimobuxadu.medianewsonline.com/purekifaluzazugumafut.pdf
    • http://wanuvutukuv.iblogger.org/fgo_bilibili_apk.pdf
    • http://timogefubor.22web.org/core_java_programming_interview_questions_and_answers_free_download.pdf
    • https://static.s123-cdn-static.com/uploads/4375886/normal_5fe1a36f58514.pdf
    • https://static.s123-cdn-static.com/uploads/4423462/normal_5ffbacbd0df8e.pdf
    • http://zotoxilob.getenjoyment.net/tujeguwamabazilapitixif.pdf
    • http://expo-kit.ru/sql_server_primary_key_recommendationsjt4mm.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/dad5ad19-4514-453c-8365-ff79e7eaccb0/52617905157.pdf
    • http://nezefipiraxifov.epizy.com/wamesiraxuk.pdf
    • https://uploads.strikinglycdn.com/files/4aff3160-82ed-4042-abc7-3f203f95468d/4272465241.pdf
    • http://datidogebe.epizy.com/adobe_flash_player_android_7._0_apk.pdf
    • https://uploads.strikinglycdn.com/files/86e39cf2-d2d2-4415-a73c-bf27452f8a98/un_curso_de_milagros_leccion_24.pdf
    • http://votarim.epizy.com/pup_scholarship_2019_answer_key.pdf
    • https://uploads.strikinglycdn.com/files/e928634c-b194-4932-a338-c453714f4c28/delta_shopmaster_scroll_saw_ss200_parts.pdf
    • http://jetijawutapa.epizy.com/61097404250.pdf
    • http://siberasule.rf.gd/sat_2_answer_sheet.pdf
    • http://vuniwetare.rf.gd/ariens_17.5_hp_riding_mower_owners_manual.pdf
    • http://sasukagisodubex.onlinewebshop.net/hollywood_the_dream_factory_an_anthropologist_looks_at_the_movie-makers.pdf
    • http://joberemig.atwebpages.com/bulemudafedefa.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb62.bin
58ceca57b0b3b18663af589760576eb2266f52eb5629c2f2ce0fc3b9309bf121		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB62 4988 bytes
font_01_sfnt_off00010c90.bin
a492598d208f3007c99f8c1bc1e8d310c769ceab8826fa83119be5e540bbc06d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C90 12400 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.