Malicious PDF — malware analysis report

Static analysis result for SHA-256 77afa013f9bb2da2…

MALICIOUS

PDF

92.2 KB Created: 2021-06-27 12:18:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7c5cdcfeb4f25c513710ce3ae8c287ff SHA-1: 364c46371282b2e8a8d21154fb856d64d5316fc9 SHA-256: 77afa013f9bb2da2f568ab188e98bffe1d18e896b677f43da657ff79795c710f
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to other PDF files, suggesting a phishing or malware distribution scheme. The primary lure appears to be a link disguised as a search result for 'speaker volume booster download for pc', which redirects to a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://donghocasiochinhhang.net/uploads/userfiles/file/39668269119.pdf
    • https://rdsdealers.com/ckfinder/userfiles/files/jobovojofu.pdf
    • http://ff-engineering.com/userfiles/files/79238468622.pdf
    • http://chonburi33.com/userfiles/file/likoxagelodipal.pdf
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/u9r1j114rotsvcd169bh940hub/47736203307.pdf
    • http://koszyczarek.pl/userfiles/file/fiwajugitubukirijo.pdf
    • http://thuephotocopytaihanoi.com/upload/files/38291649502.pdf
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/oqad4cb8idmoh80l7ca3kvg7k7/kijibadigowa.pdf
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/09e2000c8f8607d91720b687c7aa5cf6/66725397942.pdf
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/160898d16c1936---tofuluxujujurazukiguboto.pdf
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091fe39d0041---gizumuga.pdf
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/66a2776b513706263e8caafa8bad0e6b/58753498330.pdf
    • https://tiklatakip.com/calisma2/files/uploads/22750684834.pdf
    • https://www.truegridpaver.com/wp-content/plugins/super-forms/uploads/php/files/c3068e76d6b5a979e918427514152d28/resufakidefuxa.pdf
    • http://bouncebodysupplements.com/newerac2c/userfiles/file/latiki.pdf
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/v92ogthtp39523527tvhm7t2fc/moliwanogovizozimufew.pdf
    • https://protradingindia.net/userfiles/file/kavobomanowaberojusowa.pdf
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad925db18af---3862363641.pdf
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/6ffccb98e8da7dd7dd1c37c916fca023/11095116358.pdf
    • http://rainbowcaterers.in/userfiles/file/jikeperufojukawipiroxo.pdf
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160703a31497ea---30782859578.pdf
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/6s4cfsogh9ano0snl1j9pr8kjv/padumedoloxat.pdf
    • https://seerupit.dk/assens/file/pikebalisuseba.pdf
    • http://erdivigado.hu/userkepek/file/rajodofexajasopemopig.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=speaker+volume+booster+download+for+pc
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecc5.bin
1a83345da2b75ffda9f9e68bbde991602019aa8c51a0a61f335140f672bba6e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECC5 17796 bytes
font_01_sfnt_off00011ae6.bin
eb83fb48a2f60ac59fad768156047f025764cad4052c8f34695a9c8dd2456ad8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11AE6 16132 bytes
font_02_sfnt_off00013057.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13057 16792 bytes
font_03_sfnt_off0001486e.bin
e539b8651517b95bde33a99b80ce6a27c77d4fb2f490756da873f7d7006ed543		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1486E 11248 bytes

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