Malicious PDF — malware analysis report

Static analysis result for SHA-256 069e2ca2f8e8b34f…

MALICIOUS

PDF

130.2 KB Created: 2021-06-20 09:11:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 473bd327fcfd11ec0a6b264f04e68ed9 SHA-1: 21c738576654179cc339fffa050be09576691e9b SHA-256: 069e2ca2f8e8b34f42afcf331c2db72c74af552a6a9f1d5cd4753c980aa49281
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and ML classifiers, indicating a high likelihood of malicious intent. The heuristics indicate it functions as a link farm, pointing to multiple compromised CMS upload locations and disposable hosting sites, suggesting it's used to distribute further malicious content or phishing lures. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and a date, suggesting it was generated programmatically.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8258

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://gz-theoutfit.com/UploadFiles/FCKeditor/20210612203739.pdf In PDF document text
    • https://xn--fct8ml6mwue.tw/uploads/files/71639697880.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/9f838c93090f3b361514e7b58da16417/48573733562.pdfIn PDF document text
    • http://askort.pl/Upload/file/rexokoruvanexalinogafaj.pdfIn PDF document text
    • http://hkt-optics.com/hkt/images/userfiles/file/11828475649.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1606c879783505---piwitekogilumafakitora.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/8s0t0q0b80m4b43jceohvempni/28054652036.pdfIn PDF document text
    • https://areicon.com/images/file/venapobam.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160748aa62b365---jineroforurikivibunezi.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/37a014fdd00277818c570462bda23a72/32942494484.pdfIn PDF document text
    • http://sclifeguards.com/clients/16854/File/dutuziruzizizop.pdfIn PDF document text
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/col9s86gn6euf1j436o7o00gec/dewelusogareralanib.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/1606fba28b481a---gopegow.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/qlkbmtclcd9aopsbiblb02vgpo/butevobafijajafip.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0514d314c---niwulazejakexelesufak.pdfIn PDF document text
    • http://aire-limpio.com/img/editor/file/pifawaxizeremifonufet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102HussainIn PDF document text
    • http://smc.org.inhttp://smc.org.inIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=kanda+sasti+kavasam+song+mp3+downloadPDF link annotation
    • http://scripts.sil.org/OFLIn PDF document text
    • https://gitlab.com/smc/meera/blob/master/COPYINGIn PDF document text
    • http://sinhala.sourceforge.net/In PDF document text
    • http://sinhala.cvs.sourceforge.net/viewvc/*checkout*/sinhala/sinhala/fonts/CREDITSIn PDF document text
    • http://www.gnu.org/licenses/gpl-2.0.htmlIn PDF document text

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017561.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17561 10256 bytes
SHA-256: 783210c709ed100bd7f9b34cf9850fda235c298ebf2ee7b90cd974d6c5eb36ce
font_01_sfnt_off00019761.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19761 5532 bytes
SHA-256: 7d957c82abbec565dd8bc800384dd108af42d6094849dac2ccb89d05b46ce4fe
font_02_sfnt_off0001aa3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AA3D 4784 bytes
SHA-256: 3529e284d6dbe5ac9d2d5f4460ffe8de0ac40f857f19530855983fed29b4cef9
font_03_sfnt_off0001badc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BADC 4076 bytes
SHA-256: fc19da7b3e968f51685053945dc84727ad9861a206cfc413c3f223075c2a7e38
font_04_sfnt_off0001ca15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CA15 7828 bytes
SHA-256: d2c1a3f44c70659b2c2dcb0c16f617ba013d401c94233898530b8cd30d1ae0af
font_05_sfnt_off0001e291.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E291 13280 bytes
SHA-256: 72bc6d130b35c4d82074462ea9871ca1ac8bd0fd2aeb560a0a199e6807e6e27e

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