Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c5c2bfc20a90edd…

MALICIOUS

PDF

68.8 KB Created: 2021-01-17 20:03:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 9e48b0ce823fdb035cec1712ce422d4d SHA-1: 8279f361701d3f13a1962ce73217148817a3dac3 SHA-256: 8c5c2bfc20a90eddbb80eec01dedc27558e18989533fe82af65963b43d5db27c
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, traffking.ru, which is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the presence of an external URI in a malicious PDF suggests an attempt to redirect the user to a compromised or malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://traffking.ru/123?utm_term=cedarburg+school+district+news PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4450889/normal_5fd7de8ef0b0e.pdfIn PDF document text
    • http://ludokebisiw.iblogger.org/best_story_games_for_android.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451365/normal_600219a0456a2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374024/normal_5fcc289c06021.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409421/normal_5ff711c72eae6.pdfIn PDF document text
    • http://pimebujeben.66ghz.com/15678781944.pdfIn PDF document text
    • http://zulurasovuguloz.66ghz.com/sekomamukig.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nixuverojezuluz.epizy.com/45997969249.pdfIn PDF document text
    • https://s3.amazonaws.com/welanisowari/adobe_reader_mac_catalina.pdfIn PDF document text
    • https://s3.amazonaws.com/wutogugej/36721530011.pdfIn PDF document text
    • http://dogefifuga.rf.gd/rengar_build_guide.pdfIn PDF document text
    • http://kewivifonawati.epizy.com/medical_virology_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tupofelasujewas/46497396900.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/42168445858.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/cablevision_channel_guide_new_jersey.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwuxot/57296324916.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/7289884048.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/96808541586.pdfIn PDF document text
    • http://xebowuruno.epizy.com/89996606415.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/android_sdk_version_popularity.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/kalarefalapax.pdfIn PDF document text
    • http://wizebefekeb.epizy.com/81802106316.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/cajitas_de_regalo_manualidades_faciles.pdfIn PDF document text
    • http://zepenolewiri.epizy.com/25975551862.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_off0000cd8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD8F 5336 bytes
SHA-256: 6c93058c19fda52e773c3512a648d850ed0bad28b3d9e961207df21d8a0ead84
font_01_sfnt_off0000dfb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB7 10724 bytes
SHA-256: 1264c6b1a99e150abf52972e54bd111f99e318820cdbf496e1547e6117a9d52d

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