Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d702b47403d636d…

MALICIOUS

PDF

74.6 KB Created: 2021-09-09 20:54:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b965f08f23460ea67bdc4957831da5c2 SHA-1: 31e5b29b726d1ba65aaee1a0587c2a96375b5778 SHA-256: 7d702b47403d636dcd77b733a5cc174cced92b2fb3a2fbf6c73e725dbdbf9a75
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised WordPress uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the redirection to these external URLs, which are characteristic of phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

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://coretry.ru/uplcv?utm_term=self+camera+apk PDF link annotation
    • https://rowadalbyt.com/userfiles/files/77276175940.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3a358863dfc19c3dcffa531086dc7ba5/dajoxix.pdfIn PDF document text
    • https://hebatkeren88.com/contents/files/sebumatonififesapuvedujoj.pdfIn PDF document text
    • https://aiaciran.org/cache/fck_files/file/wogewalurolof.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/34c85a2d9f18b5be53b7717623b7a7ce/40329008187.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/u00ot9ka2ls0usvouk8ug72a1r/91049327034.pdfIn PDF document text
    • http://diysmart.net/userfiles/file/nonunod.pdfIn PDF document text
    • http://bakefruit.com/uploads/files/202109080932489696.pdfIn PDF document text
    • https://spbmworld.com/anaeter_capital/siteadmin/userfiles/files/62828480875.pdfIn PDF document text
    • http://carneiro-sa.pnh.pt/js/ckfinder/userfiles/files/93908299022.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/78f4caca65563d289b1ce51a5ffcabf6/206112637.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1613864db7f859---satowixapopukosefo.pdfIn PDF document text
    • http://lafenicealcamo.it/userfiles/files/teroxewo.pdfIn PDF document text
    • http://www.yoko-ono.be/images/userfiles/file/73597594423.pdfIn PDF document text
    • http://dgelc.com/userfiles/file/20210905111342.pdfIn PDF document text
    • http://ecohost.ru/pics/images/file/65149987222.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f69e924353---lorelufiwoxesirotol.pdfIn PDF document text
    • http://geodavidepini.it/userfiles/files/nuxikizam.pdfIn PDF document text
    • http://pro-group.ru/userfiles/file/bemamogowosul.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/3ccbc2a0c3476a639b28f7147cdb7405/xotosuvewux.pdfIn PDF document text
    • https://autoradiator.mn/uploads/ckfinder/files/59276231498.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/a39q0c367bvcs61va7t6iau7ed/mopisilebezowezumarepo.pdfIn PDF document text
    • https://easternresources.net/ckfinder/userfiles/files/52569951727.pdfIn PDF document text
    • http://markfarolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/58309558412.pdfIn PDF document text
    • http://boxethai38.com/upload/file/fovodapaxujusidekesute.pdfIn PDF document text
    • http://tentimesneedlehill.com/UPFILE/userfiles/files/81295636604.pdfIn PDF document text
    • https://mamalight.net/business_school/uploads/file/47436044140.pdfIn PDF document text
    • http://lightofislamonair.org/uploads/files/jigijibovavurofuxojafo.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_off0000c0a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0A8 17392 bytes
SHA-256: b0244dd367de45db15d5eab55d6881a8aad69d35dca4494b75eafa88d2f584e2
font_01_sfnt_off0000edd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000105ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105EF 10228 bytes
SHA-256: b2408781ad2e20ecf8f949dbcf27dcd49eab33d12e86736f680052ff6e0ada5b