Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bb27a1b86e1f03c…

MALICIOUS

PDF

368.4 KB Created: 2021-09-06 14:25:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: d7d3009981547a2e3e1ceeada00ae7ae SHA-1: a581fa2783c820049e5ff103c7233a501077c5ee SHA-256: 0bb27a1b86e1f03c6d0d2f4af2016a6296e55b5a0e54ed3d41a0eba19df766d7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8966

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.
  • 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://archism.ru/uplcv?utm_term=ghost+rider+comics+pdf+free+download PDF link annotation
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/ba2cb09090209d24fc82e0520c3c8b25/83682605715.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba38eb70d89---puvunapagejaletaxax.pdfIn PDF document text
    • https://jcpcdesign.com/upload/ckfinder_temp/files/20210628034651.pdfIn PDF document text
    • http://thepnguyentran.com/media/ftp/file/bupimijit.pdfIn PDF document text
    • https://electrabicycles.pl/app/webroot/uploads/file/16228109504377.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/bokufilivipuwowe.pdfIn PDF document text
    • http://emilymillerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/98778905180.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/inv6hus069bupe8u21nimh3nr4/52781724794.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/17c4008727c08ed20fcd32233808680a/61940255980.pdfIn PDF document text
    • http://phyllisrubensteinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/16366291698.pdfIn PDF document text
    • http://rapabzenec.cz/obrazky/files/pilivuxekizikizize.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/db3312952ba50c99c795e184c494ca11/24322787693.pdfIn PDF document text
    • http://thebeautyofdesign.nl/ckfinder/userfiles/files/kajitunuwevepelurupipuza.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/16102b550839b8---26595327889.pdfIn PDF document text
    • http://hzeiger.com/userfiles/file/6943384043.pdfIn PDF document text
    • http://irishheritagesociety.net/clients/7/7f/7f3653e4c5d791bf76f28d2bf9929747/File/gokubodumaruride.pdfIn PDF document text
    • http://gibisch.org/files/files/73180335019.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b7008e22e1---tulanezo.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160895306272a3---vefaz.pdfIn PDF document text
    • http://sjar-tech.com/uploadfile/file///2021070302014842.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609faf32a9809---63540658180.pdfIn PDF document text
    • http://griby.biz/ckfinder/userfiles/files/11987837741.pdfIn PDF document text
    • http://apluskleaning.com/admin/images/file/kifoduluteterupufexitam.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/56c4ecda0bf3522e8cb65b9ec58f0fbc/bironukofivaju.pdfIn PDF document text
    • http://toshiteriyakiburien.com/uploads/files/dobakofuza.pdfIn PDF document text
    • http://szentistvanpatika.hu/upload/file/45495209131.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0005519d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5519D 11008 bytes
SHA-256: c46abd02fac4a32ef2214c28d3eec951242c10ec9b24e6959fcaa22bac528374
font_01_sfnt_off00056b1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56B1A 17976 bytes
SHA-256: 17aa6ab5ae09d558ec4177fea433fed00ba557b838a8902f83d5b8154182d575
font_02_sfnt_off00059968.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59968 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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