Malicious PDF — malware analysis report

Static analysis result for SHA-256 67e0d6535fb9ecef…

MALICIOUS

PDF

85.1 KB Created: 2021-03-31 03:04:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: c08f4164578596db7de847fe8d9775fc SHA-1: 18af3802c498ba8e12ed033a04a87322812c86c7 SHA-256: 67e0d6535fb9ecefd3fd129b8fb72c63a9965a73dacb492357e28f2811e4ae23
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with the primary one being 'https://gimoguvi.ru/strik?utm_term=logo+design+contest', suggesting a phishing or malware distribution lure. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect the user to a malicious site, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://gimoguvi.ru/strik?utm_term=logo+design+contest PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4421207/normal_5fe4f4531573e.pdfIn PDF document text
    • http://zoguponuwuxoli.medianewsonline.com/rilolitekanuxenu.pdfIn PDF document text
    • http://azakalaza5.xyz/746312808801uion.pdfIn PDF document text
    • http://luwinilulurop.mywebcommunity.org/zimiba.pdfIn PDF document text
    • http://fitdieta.com/what_happened_in_american_gods_season_2_episode_8iyjp4.pdfIn PDF document text
    • http://zedakobogesa.mypressonline.com/58728542986.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380210/normal_5fe2b4be31626.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489981/normal_60003b8ae18ec.pdfIn PDF document text
    • http://organic100.fun/new_album_song_video_2019y1mji.pdfIn PDF document text
    • http://halfraire.xyz/93810333770fs4qu.pdfIn PDF document text
    • http://vozuzutiwajuzip.getenjoyment.net/xarelto_package_insert.pdfIn PDF document text
    • http://lnstagramcentre.net/john_lewis_radio_controlled_alarm_clock_instructions39paf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403143/normal_5ff635e83e00a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390381/normal_60081f75e83fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451035/normal_604f750ab31cf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403120/normal_6045f4a6e6015.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fuvarijes.atwebpages.com/97067011337.pdfIn PDF document text
    • http://povosiz.epizy.com/budaxuroxiverelebotez.pdfIn PDF document text
    • http://wetavirevamo.epizy.com/debtor_and_creditor_in_balance_sheet.pdfIn PDF document text
    • http://mafizili.epizy.com/apache_tomcat_manual.pdfIn PDF document text
    • http://xekubot.epizy.com/wivaxediloxivikek.pdfIn PDF document text
    • http://bisavosimirot.rf.gd/whirlpool_duet_washer_manual.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11157 4712 bytes
SHA-256: c14ec043eda4d00848eaaac20a7565328538f60475b8fc5c85544c0432c1750f
font_01_sfnt_off00012180.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12180 11172 bytes
SHA-256: 88eaf5f2029211e3e007353285b38c2fc7baf5a4df7852df58c698c3b42668fe

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