Malicious PDF — malware analysis report

Static analysis result for SHA-256 8651a94c73a2fa4a…

MALICIOUS

PDF

85.6 KB Created: 2021-03-22 19:04:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 7bca86e17aad0e14025bd3a983112b45 SHA-1: 5a61f3917e6ce1e7fa5b83fe6aa2fdc66dcfea71 SHA-256: 8651a94c73a2fa4a859f6dc9ee82f5e05806826ad89ed8fc0ba10c5c55f86a5c
134 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains numerous external URIs and is identified as a link farm, suggesting it's designed to redirect users to potentially malicious sites. The presence of embedded URLs and the nature of the link farm heuristic point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/aws?utm_term=baldur%2527s+gate+2+jaheira+romance+ending PDF link annotation
    • http://kazexajisodibu.medianewsonline.com/98829835.pdfIn PDF document text
    • https://cdn.sqhk.co/zafazegig/u0jijfO/3785021252.pdfIn PDF document text
    • http://subfamjtii.site/kuzadupitebuvadb28rk.pdfIn PDF document text
    • http://look-hotel.com/any_nail_places_open_today_near_menirty.pdfIn PDF document text
    • https://cdn.sqhk.co/wadebekop/Dchf5gc/paypal_card_apple_wallet.pdfIn PDF document text
    • http://copyrighthelpbusiness.net/jugotomijuorn75.pdfIn PDF document text
    • http://manibupefif.mypressonline.com/jisodememugusexudemipiwi.pdfIn PDF document text
    • https://cdn.sqhk.co/xafiguzi/jjgnjic/anti_censorship_software_for_android.pdfIn PDF document text
    • http://kofojoxake.mygamesonline.org/speak_english_podcast_com_004.pdfIn PDF document text
    • https://cdn.sqhk.co/noradinez/IPigajo/sad_breakup_status_video.pdfIn PDF document text
    • http://fishing-rods2.club/cruise_line_reservation_jobs_from_homezg4k4.pdfIn PDF document text
    • https://cdn.sqhk.co/malevevipali/gBBxD4H/40744471548.pdfIn PDF document text
    • http://salejozokaboruz.22web.org/gozoligela.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fa90eb46-aa9b-4fd1-a2e8-e903ec8e50a4.filesusr.com/ugd/575fb0_5f4ce521f7614598842016170845398e.pdf?index=trueIn PDF document text
    • http://wilogoxe.epizy.com/13453234386.pdfIn PDF document text
    • https://c31d65df-273c-4bcc-acfb-7b03b0724b99.filesusr.com/ugd/e7e4a0_ab45620e1ae340f29de1214bbb22934d.pdf?index=trueIn PDF document text
    • https://b6e49935-6d58-4bde-831f-6e0b746776d3.filesusr.com/ugd/7d321f_1fc7d20dff8c4670a467aa4013d9fd55.pdf?index=trueIn PDF document text
    • http://matewedidoxeber.onlinewebshop.net/76053446785.pdfIn PDF document text
    • https://14319df0-7947-4f0d-bbb3-eaa17d5eb23e.filesusr.com/ugd/c45f38_41c8a8d2ffd6495bbda55a87ed583352.pdf?index=trueIn PDF document text
    • http://vezuperikeziwag.rf.gd/49437258062.pdfIn PDF document text
    • https://9eaa565e-fb97-40b4-b096-d6760803f699.filesusr.com/ugd/55e2c6_de2d0e24560e42bdaa56a5edd4cc6c66.pdf?index=trueIn PDF document text
    • http://zunimesigo.rf.gd/rinutimusimironawigavodo.pdfIn PDF document text
    • https://bbaef297-c986-4b42-acb3-0fd65605e280.filesusr.com/ugd/e9fc71_9072fc02537d45ab8156848fe2d5d0fe.pdf?index=trueIn 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_off00011194.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11194 5644 bytes
SHA-256: dcf7b8b6ace643038edf13997ceb7a6594ef065c5e8c55de03035368167d5baa
font_01_sfnt_off000124ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124AB 10676 bytes
SHA-256: c01e48ac6b970957d33a51d86468a31a483fcf33ea3ae5b7104e2a4f7ac4296c

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