Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f4943dc4869fdd7…

MALICIOUS

PDF

290.9 KB Created: 2021-04-02 23:18:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 8e8bce3909cbe4016d742ab301e75934 SHA-1: c6b7ce5910c0d378707a5e8a33264e658079ca3a SHA-256: 2f4943dc4869fdd7ade1b2a03b51578b6cc094063d7f2615748292ba4a81b1f4
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to 'https://zajinet.ru/wix?keyword=geometry+dash+free+apk+2020', which is presented as a download for a game. This URL is flagged as unknown reputation and is highly suspicious given the ClamAV detection and ML classifier flagging this PDF as malicious. The document body is heavily obfuscated, but the presence of the suspicious URL strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://zajinet.ru/wix?keyword=geometry+dash+free+apk+2020 PDF link annotation
    • https://tuvikeba.weebly.com/uploads/1/3/4/7/134732988/rowereja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485001/normal_601ef1dfd2699.pdfIn PDF document text
    • https://bobefadapuxat.weebly.com/uploads/1/3/4/8/134858353/munewererikavoz_bovokijogit_milovope_lilugep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413573/normal_60317c151c5c5.pdfIn PDF document text
    • https://wanovupejofo.weebly.com/uploads/1/3/4/5/134580977/fc9eaa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lovomijelun/how_to_service_my_kitchenaid_mixer.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/balance_sheet_and_income_statement_items.pdfIn PDF document text
    • https://d03ec42c-8b93-48d3-a61e-9aee396c0db4.filesusr.com/ugd/1e557c_2325e2772e804238adf1bc7fd980e77e.pdf?index=trueIn PDF document text
    • https://1de4b56a-3309-4767-83a2-f1bb1ea7c594.filesusr.com/ugd/a6e5e9_e187be8df76e4a56900631d02fb19c67.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0067f047-3b61-4bbc-a798-869bde77b697/9497624195.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c27e4722-1671-4ca1-b6ad-e24b70cc1d8c/83790887372.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad4d82b8-3b87-4aa3-8a3e-8f12eac31897/moniciones_domingo_xviii_del_tiempo_ordinario_ciclo_c.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/robin_hood_2010_music_soundtrack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f79076e8-899b-4f88-932c-acd4821bc47c/zogifofizevub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/578bcad4-a5d4-4a29-86c8-6a5d60d475a3/free_printable_catholic_prayer_cards_bookmarks.pdfIn PDF document text
    • https://2a4b29e6-a790-453e-81e7-e8b9caf2c27b.filesusr.com/ugd/bf0735_b149eb2eb04c48ca9afc6fb058775a41.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/91ee1eb5-07dc-4276-9cb8-a2e527b30efb/jagozov.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/army_of_darkness_defense_apk_mod_indir.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/20050482583.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db08e264-726c-4ef8-a456-90b1dbd5c933/hp_laserjet_pro_400_color_m451dn_problem_installing_driver.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
stream_002_off00011d0b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x11D0B 276276 bytes
SHA-256: fbee8e2fb17e7c45caabd363fd620230dc66f9191c1add486540cac8789e0419
font_01_sfnt_off000444c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x444C6 5720 bytes
SHA-256: 73e8d0d167e991c63bb74b8da78c07ce609b117e4b0db7e2587e805ee41a6d24
font_02_sfnt_off0004581c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4581C 10280 bytes
SHA-256: 0812a7bdfc72f875bfe18de04b4e608eade38bde8da8ad99ce52d672b1a13eed

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