Malicious PDF — malware analysis report

Static analysis result for SHA-256 99c0c4f3f10f52c4…

MALICIOUS

PDF

86.9 KB Created: 2021-06-29 11:57:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a30d68c0e47cd3f0f6108875a059c19b SHA-1: 5cd480175f248e0dd5c1e76d92da3e3ed3944e7b SHA-256: 99c0c4f3f10f52c48495c2d8cbe641262ce92ffef7b64bf9eb2db93482a722bb
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a phishing attempt. The presence of embedded URLs suggests an attempt to redirect users to malicious content. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure designed to trick users into downloading further malicious documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9923

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 https://asthasupermarket.com/userfiles/file/13168518715.pdf
    • https://www.adilaltinsoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a8082d20d8---94035770131.pdf
    • http://ingenermarket.ru/userfiles/97372142624.pdf
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16071401268fde---mufofutiwar.pdf
    • https://handientu.vn/userfiles/file/gujisubolidivekevisuz.pdf
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/fc8vpmg8mm7cc4uopfbs054rc2/63974014719.pdf
    • http://allseasonsart.com/uploads/fck_uploads/file/73077951426.pdf
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/seulhc77b88ncm6v62fv3aamh8/nuzevegumimesuvewigi.pdf
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/609ee30307ec3b9a1e36bb79e9e44842/32783480268.pdf
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/1l7go3qj5shcb9scsmskmn76e1/74653957989.pdf
    • http://hebammenglueck.de/ckfinder/userfiles/files/vavuvafumulasiven.pdf
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16081912aaec91---kanibebubavonisit.pdf
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607035353ca43---nefugisijepewononafopudev.pdf
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/bf0f44c7fff32800cf79532ac2341c60/nifiweneporigo.pdf
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160758f782f92c---75918891343.pdf
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb2abb6648---32625900209.pdf
    • http://autoshiftbid.com/fckeditor/userfiles/file/82471395813.pdf
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608293c81487d---gekefutiruzumujesirasupe.pdf
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/469c2a637987178d239fbbca351b26ba/98301069230.pdf
    • http://staractivecollection.com/resimler/site/files/75461313904.pdf
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/cebc9367b9e88f331e3ccb6c74a1fa06/4307064079.pdf
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1609f83f3f3f08---vuvaxasi.pdf
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5d43af659---pepuzo.pdf
    • http://nordicaluminium.ru/userfiles/file/noxalegezulozozusa.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=sour+mouth+after+eating
    • 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_off0000efb4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB4 16792 bytes
font_01_sfnt_off000107cb.bin
f05aa4ad0f4c41089464fb332bca24696622a33f96d1bfd20e0b25943496315c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x107CB 10620 bytes
font_02_sfnt_off00011fed.bin
f5a387d169335e966626d060b51a4f825feacacad39b8a9eb541e45b2cc45f5e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11FED 17700 bytes

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