Malicious PDF — malware analysis report

Static analysis result for SHA-256 73bce0593346f637…

MALICIOUS

PDF

85.7 KB Created: 2021-05-14 23:47:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e5e4fb6705460b60f920b4e6af862d80 SHA-1: 634d80d2ef25878c4efaa053238d9b6d67182d4d SHA-256: 73bce0593346f637cf83c268a884c5719f317609b2ed07d6e049c8a87e32cef2
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an external URI pointing to 'ponafet.ru', which is likely part of a phishing or malware distribution scheme. The presence of multiple embedded URLs, many with unknown reputations, further supports the malicious classification. No scripts were extracted, but the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://ponafet.ru/strik?utm_term=is+arby%2527s+doing+5+for+10
    • http://labagokawiboze.22web.org/nidekeromulixazamuk.pdf
    • http://sitebomobegux.sportsontheweb.net/botitiwenajafuxotux.pdf
    • http://maslovauto.ru/how_to_activate_gta_iv_pcsr8mc.pdf
    • http://dronextactical.xyz/zasoxebobilagubiraxefalhw3xf.pdf
    • http://fruits-summer.fun/zabaranenobivemobefudiy71.pdf
    • http://getepitisux.mywebcommunity.org/63580190899.pdf
    • http://gubixazolela.sportsontheweb.net/rijebufuxewatalibe.pdf
    • http://skout.tech/vilikanodatozu291h7.pdf
    • http://zokidinodajives.getenjoyment.net/lutukile.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/lukepepe/how_to_wrap_a_present_with_thin_ribbon.pdf
    • https://uploads.strikinglycdn.com/files/86a0dd13-5ea7-4432-95f4-4af829031ed1/how_to_study_torah_on_your_own.pdf
    • http://sapifux.epizy.com/kjv_1611_bible_app.pdf
    • https://s3.amazonaws.com/ragejufa/78278818901.pdf
    • https://s3.amazonaws.com/bovenotojitowe/minecraft_java_edition_1._14_for_free.pdf
    • https://c75ed97e-f406-4d79-b864-c99612e64be8.filesusr.com/ugd/a66d15_99a75736a580446da1a8cac6c3119cd7.pdf?index=true
    • https://557345b1-98c6-442d-b460-9e357c178e5b.filesusr.com/ugd/dfb5f8_46c45fe119e04382889717cfa0f6dd1f.pdf?index=true
    • https://uploads.strikinglycdn.com/files/ed005ac6-58b5-4bc9-a873-7178744226bd/ziwozirizobukewopolubuje.pdf
    • https://uploads.strikinglycdn.com/files/0e0ef994-8ad6-4121-8529-4fe4cdeca90f/amana_top_load_washer_not_working.pdf
    • https://uploads.strikinglycdn.com/files/73367cc1-fc02-409e-b1a4-37d30359678d/mezubovidiletolefuvulaz.pdf
    • https://s3.amazonaws.com/palikuvexake/24616541820.pdf
    • https://uploads.strikinglycdn.com/files/263db9ec-275b-4541-83dd-4525ab0ac995/why_things_dont_fall_down_book.pdf
    • https://c370dac7-4848-4fa0-a6df-94361299e8ba.filesusr.com/ugd/fa6303_40907305ce1f4acf9d079edd594d21ff.pdf?index=true
    • https://s3.amazonaws.com/wupiwupiwot/menizi.pdf
    • https://80c93ba6-74df-4afb-9852-3a83eaba20e3.filesusr.com/ugd/4cf28d_82fb2f2c5cf44ea7ac269bc103bb5a6b.pdf?index=true
    • 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_off00010f47.bin
1969e6a3ee83f744a117e091495825d67e76a53eff09951f3401333beecc61bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F47 5576 bytes
font_01_sfnt_off0001226f.bin
672da0c48b8c93773af5208a9813402c952a50e010348b554b85ec60346cdb11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1226F 11820 bytes

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