Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4f20bbfd69b83b9…

MALICIOUS

PDF

73.8 KB Created: 2022-05-07 11:25:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2022-07-15
MD5: 0e502530f452f049c686b6a03e794c90 SHA-1: 01bed8953f078d21af4007f07f55d50ab1ddd6bf SHA-256: a4f20bbfd69b83b99609ffa398fbbfe4ef7baf7e3d388408a0cbd146544f5a95
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and a machine learning classifier returned a high probability of maliciousness. The embedded URL 'https://norin.co.za/XSRYdR1H?utm_term=magnetek+century+electric+motor+parts+catalog+pdf+download+full' appears to be a lure for downloading a catalog, but likely leads to malware. No scripts were extracted, but the PDF structure and URL suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://norin.co.za/XSRYdR1H?utm_term=magnetek+century+electric+motor+parts+catalog+pdf+download+full
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/b23a6ca84fe8e06d6da2aa1e5c3340a0/bumawosikefujuz.pdf
    • http://thaicockstar.com/ckfinder/userfiles/files/19062863097.pdf
    • https://jugosubu.weebly.com/uploads/1/4/1/4/141417626/4959667.pdf
    • https://evermoral.hk/upload/file/1649899694.pdf
    • https://datawire.gr/files/files/gikanatapowiga.pdf
    • http://a899.net/userfiles/file/11104888893.pdf
    • https://dakawomafi.weebly.com/uploads/1/3/5/9/135959339/xusimifavubi.pdf
    • http://accessprecision.com/userfiles/file/70954016175.pdf
    • http://mindentudor.hu/userfiles/file/leserikawokedanum.pdf
    • https://gabozagabu.weebly.com/uploads/1/3/4/5/134506959/vofelovis-jesomupuxew-fikakoworobo-jukutabuzo.pdf
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/161ff28e9bada5---19447408191.pdf
    • https://tusujowifavenag.weebly.com/uploads/1/3/1/4/131453847/4312093.pdf
    • http://foto-recepty.sk/images/fotky/59404243886.pdf
    • https://gelatotagubas.weebly.com/uploads/1/3/0/8/130813077/reseg.pdf
    • https://caredevelopment.org/uploads/file/bugepemaxadebitusobokari.pdf
    • https://watfordfairtrade.org/app/webroot/img/files/dinijifazupufijiretaxoz.pdf
    • https://buwupejobo.weebly.com/uploads/1/3/4/2/134265589/df3de36de6c29b.pdf
    • https://cihangirhotel.com/upload/ckfinder/files/zogugekugen.pdf
    • https://tawatoxox.weebly.com/uploads/1/3/4/0/134018263/2148109.pdf
    • https://ratipiju.weebly.com/uploads/1/3/0/7/130740089/9053495.pdf
    • http://traiteurluc.com/userfiles/file/970259937.pdf
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/i7ub2m0e2f5o5khjcm6ljkot8r/27228651336.pdf
    • http://qianxish.com/ckfind_image/files/juvasug.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba8e.bin
e7d7bdbbea687e315fa333eecaf3776b7c5ff7f339bfdabdf977e825f13726dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBA8E 11348 bytes
font_01_sfnt_off0000d527.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD527 16792 bytes
font_02_sfnt_off0000ed39.bin
ece52f134b3445b5c6a8ca1260a7b0828650a3a35fb565ffb676c16885af318b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED39 16792 bytes

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