Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7ab65f1a41209c0…

MALICIOUS

PDF

86.2 KB Created: 2021-06-25 23:09:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1848846dc7c17fe3a359b1c4ea505129 SHA-1: 00dadca365712beaf82d71276ea7617bf8b84b96 SHA-256: b7ab65f1a41209c08572f732a32639981c42ea832348ccc3565a87ceea8cf894
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the heuristic firings and URL analysis point to a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

Heuristics 6

  • 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
  • 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://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e505acdb58---dedizowekesupaxasegi.pdf
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/33lvrq7mo1eh50fv567ukola80/74844625399.pdf
    • http://pytextiles.com/userfiles/file/zetulovi.pdf
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/ac9eb2cdc2f953b660dee5225c281396/63955142925.pdf
    • http://lawrence-spruill.com/clients/42275/File/bovak.pdf
    • http://doktor-okonski.pl/uploadimg/file/fikemo.pdf
    • https://cuacuonbentre.com/upload/files/nimosesejupugumonexez.pdf
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/viqv7lt07m131e8odni7vn9npa/44716609049.pdf
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/ded8bafa03a88c71a1d99cb62a369a82/rudipagexoko.pdf
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079f53be7faa---kewepapudenofazixujuwefa.pdf
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/s1qeoj6ordamdkeut809ujo8n6/36530873624.pdf
    • http://gingerbreadvillage.org/clients/e/e3/e396b250b60561adcb946853f9f62e29/File/96970224654.pdf
    • https://wulf-sanitaer.de/wp-content/plugins/super-forms/uploads/php/files/1qf61jr86319qh0kutflh2fonb/paxuwifosesiwuxiso.pdf
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/f17mqq21o3mmfv6k746rfkanh4/25133821082.pdf
    • http://presssimayeshahr.ir/pic/file/95830872401.pdf
    • http://gayaarchi.com/userfiles/file/20210616004243.pdf
    • https://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/bk5ogqhiet37vbjptdkvu63ob2/fakazowitewezowuto.pdf
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/16098358314e9a---jomorovojavibebigobatasek.pdf
    • http://coss-wynn-reunion.com/clients/d/db/dbe3622004495b304d8703879a486b7d/File/xijolasafogo.pdf
    • http://brandnewgoods.net/userfiles/file/ligudunefofadek.pdf
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/34362dbdbbd7bc0e7348f15cef24b34b/bagatomugelez.pdf
    • https://barrierball.cl/ckfinder/userfiles/files/65761604593.pdf
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/eb2c7283be153d22954a2107b39f1cb2/66851032495.pdf
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f3a61da25a---kikozu.pdf
    • http://mastervgtour.by/var/upload/file/gujetu.pdf
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/97bba2634993b6b1c0b065d01d6657a3/tajagekuzebulule.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=ready+player+one+full+movie+download+720p
    • 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_off0000ed1e.bin
30e07682e8895da680c610f2df32aa36e6cdd4d9423cea3443d6e7e39fcb9ecd
pdf-font-stream PDF embedded font (sfnt) at offset 0xED1E 11096 bytes
font_01_sfnt_off00010708.bin
f2d02de6d4e05aa114f7a5f2c561518cebe2f110f47af45660c63d421bc8dbc0
pdf-font-stream PDF embedded font (sfnt) at offset 0x10708 16884 bytes
font_02_sfnt_off0001330a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1330A 16792 bytes