Malicious PDF — malware analysis report

Static analysis result for SHA-256 199e6272b174a81a…

MALICIOUS

PDF

85.4 KB Created: 2021-08-15 18:51:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: ccf9ac33c0836784318dc11113454765 SHA-1: 79c1eaf523079e557871231de4e6d40fad32076b SHA-256: 199e6272b174a81abe9a9f4168f4f6ee5d165c8ad566bf979f79645519af7515
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links pointing to potentially compromised websites, indicating a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' strongly suggest the document is designed to host malicious links. The embedded JavaScript likely facilitates the redirection or execution of further malicious content.

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 http://dh-cell.net/ckfinder/userfiles/files/bowuweb.pdf In PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/e3a34b48fe87f56350edb262768473fc/2058882119.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607200f6135bb---46773707777.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160777b10b06c2---pezinozisuva.pdfIn PDF document text
    • https://uetty.xyz/js/ckfinder/userfiles/files/24151619201.pdfIn PDF document text
    • http://ohana1bbq.com/uploads/files/pikuvar.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/16108b3e13496d---580860051.pdfIn PDF document text
    • https://kme.pl/global/app/webroot/uploads/file/16255940955591.pdfIn PDF document text
    • https://ddc-touggourt.dz/ar/files/83217110046.pdfIn PDF document text
    • http://anhopphat.com/uploads/files/71023957318.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/ca52c427240d42f6fd011a7700c3a983/98703750966.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/e6g2mpndj4o7085mr7vaoo00ts/67630703772.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/9e0086086dc5a9a7c429e8d525a3cdf6/kemaj.pdfIn PDF document text
    • https://airbays.com/userfiles/file/zugejeleb.pdfIn PDF document text
    • http://goteneplast.se/files/images/file/48211803987.pdfIn PDF document text
    • https://kovtec.pl/eurostyl/photos/file/guwujujokiwipelogop.pdfIn PDF document text
    • http://poiskvod.ru/images/file/73605850695.pdfIn PDF document text
    • http://tensoinox.com/userfiles/files/xifokasites.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a20ade41df0---mukevelogiruvejore.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/4ba2660f03c6ee85c4b1fe34ba4a682a/jewasufa.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/ratewedibe.pdfIn PDF document text
    • https://tonymusic.se/UserFiles/files/jikikuzizibutoxogivugid.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/618f4a92d5003cb6a1743ddf0340043f/61413013209.pdfIn PDF document text
    • http://music-summer-courses.eu/upload/files/zesozibur.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=suicide+squad+2+full+movie+online+free+downloadPDF link annotation
    • 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_off0000e59d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE59D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fdb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB4 11132 bytes
SHA-256: 6a924354a0a99967e732c5b7192ec050cf55bac301bc7ef91d83df057a3d0fd3
font_02_sfnt_off00011789.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11789 17692 bytes
SHA-256: dce96f8d8e67701cba2e0d175c7137e3c0fb5260bbf4175521488c5984ece23b