Malicious PDF — malware analysis report

Static analysis result for SHA-256 45e1dce439f78056…

MALICIOUS

PDF

81.0 KB Created: 2021-01-18 10:15:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3146ee6cba7ae71bfdc145e31707468d SHA-1: d487ad23200dd311a8fe080f6dae8cbab65b39cb SHA-256: 45e1dce439f78056948875fabe7e0cb317a4b917a1c5bba1d9792714643ec6de
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into visiting it for information related to 'blood spatter lab answers'. No scripts were extracted, but the presence of an external URI and the nature of the ClamAV detection strongly 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://trafffe.ru/123?utm_term=blood+spatter+lab+answers
    • https://static.s123-cdn-static.com/uploads/4486363/normal_5fe20d23ef3b9.pdf
    • http://mekatososa.iblogger.org/adobe_creative_cloud_size.pdf
    • https://static.s123-cdn-static.com/uploads/4450340/normal_5fe40a0ec3cdf.pdf
    • http://pubomoxagu.22web.org/pasagotiwiloxadivedipane.pdf
    • https://cdn-cms.f-static.net/uploads/4479436/normal_5fbf7c9518849.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://vapedefomagejev.epizy.com/whatsapp_messenger_app_latest_version.pdf
    • http://selofedibaxonal.epizy.com/bed_sheet_online_shopping_cash_on_delivery.pdf
    • https://s3.amazonaws.com/wovitiku/99308433685.pdf
    • http://jojanotesejivi.epizy.com/buvebavomuburo.pdf
    • https://s3.amazonaws.com/woberiz/panasonic_aw-_he40hw.pdf
    • http://xepalufozakot.epizy.com/burning_bright_tamil_dubbed_full_movie.pdf
    • http://lodavudomajip.epizy.com/nomogalijevanabub.pdf
    • https://s3.amazonaws.com/juduk/goferefakuki.pdf
    • https://s3.amazonaws.com/ladojenefe/serizatopuvuvimejuvadur.pdf
    • http://dijovomivuz.rf.gd/malware_antimalware_free_cnet.pdf
    • http://lodavudomajip.epizy.com/90607435962.pdf
    • https://s3.amazonaws.com/lizuseguwix/report_car_accident_dmv_california.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f583.bin
06bc98375f4369e3906d0b2036150d35ef2da18a2ad07d4dde51c37cb0e269c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF583 4972 bytes
font_01_sfnt_off00010680.bin
6a6465fa8e2f59d040ae55e70897fc285c0c880b095c07d2744aa005b4a622c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10680 10104 bytes
font_02_sfnt_off000128c8.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x128C8 4324 bytes

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