Malicious PDF — malware analysis report

Static analysis result for SHA-256 a72441236cce9974…

MALICIOUS

PDF

75.1 KB Created: 2021-06-28 01:53:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6e5000539bdc4efab80fb5e52ea4760c SHA-1: e370250620f7c80782835d95ffa2c510df121f9c SHA-256: a72441236cce997481cf3772bab1ec43ea9460c736eb18c67cd851bfcae5d745
164 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains embedded JavaScript and numerous links to compromised websites, suggesting it is designed to deliver a malicious payload or facilitate phishing attacks. The presence of JavaScript points to an attempt to execute code within the user's browser or PDF reader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://krisoc.ru/uplcv?utm_term=12+strong+123movies
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16081c72e9be90---nunugudiruvunozawokutizi.pdf
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7c1c6d8adf---2613912815.pdf
    • http://inspiredindianfoundation.org/uploads/88154219065.pdf
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608cbd84de8d6---67742728436.pdf
    • http://hifimarkt.eu/kunden/kronhardt/ckfinder/userfiles/files/zugipigoj.pdf
    • http://austria-ex.com/images/blog//file/roxokodasexixitugeju.pdf
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d0293d05587---82629480081.pdf
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/51ueskm6v6oov7r70mmkpbglv2/40704437411.pdf
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/9p8e8l5go2opsnpknnljgvk857/xiforevuji.pdf
    • https://eatorhours.org/e-bussiness/fckimages/file/96799735503.pdf
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/0f19f58e4e8bab5961c98e784ec947f1/97514041431.pdf
    • http://come2menorca.com/images/file/zevabe.pdf
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/87414c2e32392386702384ab846d875f/58782577873.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/k79dmevirhsn2bhjhh67hurh21/tufolevelunugobawo.pdf
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076abe7f24a8---53754565848.pdf
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608c9046b5a63---58938097542.pdf
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160a225b96b5ee---tidudivukadesapi.pdf
    • https://xn----7sbbjg7ctfs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5fe6402461889c720da6e94140e977d1/wifawisewozumojar.pdf
    • https://cgeminfos.ma/upload/file/47431063008.pdf
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/8a032e0cbc43b992efa05428a5fe3ec6/foxowoxeketigozelo.pdf
    • http://paintmaster.hu/js/ckfinder/userfiles/files/letexiwufir.pdf
    • https://www.hinogas.com/wp-content/plugins/super-forms/uploads/php/files/kv5h6h74mtl71p6sj812cd7qd7/revuwulotepizefomolix.pdf
    • http://giaodantanthaison.com/Images_upload/files/punadagulisakexuvutebine.pdf
    • https://mariellatriolo.it/public/file/xenavepobozilor.pdf
    • 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_off0000c213.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC213 16792 bytes
font_01_sfnt_off0000da2a.bin
e0a6fe0805f3ea7efd22bddab72149d60a1cf7e0e00467b47d5a77b58a8d3bdb
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA2A 10556 bytes
font_02_sfnt_off0000f25d.bin
ab152791630faf2180f218c6783539b448901d82adc14e47da64ef8b7086c66b
pdf-font-stream PDF embedded font (sfnt) at offset 0xF25D 17212 bytes