Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5bffdb2bd1bf7d5…

MALICIOUS

PDF

83.1 KB Created: 2021-03-14 17:28:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 50159b5db82740cec325684b1ea834c7 SHA-1: ee4380353d04b057a6d7dee3c6187be341910dec SHA-256: d5bffdb2bd1bf7d543bad093614bc3a94525116624bbbeebd72489d7d8468c1d
96 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing site. While no scripts were explicitly extracted, the nature of the detection and the presence of external URLs suggest a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://resalured.ru/123?utm_term=complete+university+guide+computer+science
    • http://jakusavu.sportsontheweb.net/tujudom.pdf
    • http://kawafopi.mygamesonline.org/ncert_chemistry_book_class_12_part_2_solutions.pdf
    • http://sarobivavoma.iblogger.org/motorola_sbg6580_manual_espaol.pdf
    • https://cdn.sqhk.co/fepixuzutol/5Ejczhd/retinopatia_serosa_central.pdf
    • https://cdn.sqhk.co/puvubuzu/HrgeZJp/rv_parks_near_medina_tx.pdf
    • http://kijofizovurisos.medianewsonline.com/40256078430.pdf
    • https://cdn.sqhk.co/samojusive/hijhIMr/pokemon_quest_gameplay_espanol.pdf
    • http://nevinidonet.mywebcommunity.org/relusudifip.pdf
    • http://zafidobavamus.22web.org/hallelujah_chorus_lyrics_sheet_music.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://lumosaneja.onlinewebshop.net/84788597492.pdf
    • https://fb9345b8-40be-4608-a8ff-9c5427dba92f.filesusr.com/ugd/98d639_e7b9cbf7a82147c6a7d418acc6611bac.pdf?index=true
    • http://xizokenimufewom.atwebpages.com/rain_bird_5000_mpr_nozzle_chart.pdf
    • http://ramapenutizawa.epizy.com/milutapaborovovalisa.pdf
    • https://b7eb3c74-9f10-4efd-a612-efb7ea03662f.filesusr.com/ugd/7198c1_e91b8dc93caf4e86843314ed6ec342b2.pdf?index=true
    • http://fezabum.rf.gd/93602888142.pdf
    • https://4123e755-5e7e-4fb8-b167-49ba90d37259.filesusr.com/ugd/fd3290_edc34000f31d4d9387cce0116d40f77f.pdf?index=true
    • https://2ea3657d-1c4c-40dd-8491-58aeeb8dc933.filesusr.com/ugd/18a85a_85e7132d1610465b965b33c7cf3b0db6.pdf?index=true
    • https://ef4b221f-cfb4-47e8-bf1d-3b5092770df7.filesusr.com/ugd/4948da_62c02d2633bf44c588c4a4c6253da4ac.pdf?index=true
    • http://tuwutexo.onlinewebshop.net/voperavozukewomojaxu.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_off000106de.bin
3203c0e2f617e489c81cfc5e9957579c3a8271ed23ba91d378c69a74ad0cbf9b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106DE 5248 bytes
font_01_sfnt_off000118b1.bin
4f259df8eed7e4d6082750ce8d6ac131404318e9a5a2890eb8ce8348091681d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x118B1 10568 bytes

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