Malicious PDF — malware analysis report

Static analysis result for SHA-256 69fe858b238769e1…

MALICIOUS

PDF

108.9 KB Created: 2021-07-04 00:12:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7550503a934657c05f0dd4d472819b23 SHA-1: 84f15274e6a81de55d4d5a34acb760b6c0bd37f5 SHA-256: 69fe858b238769e121b30ddd34db8b7fb481d4c33c844499fee664bb97ee9f4a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF sample was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It functions as a link farm, distributing links across numerous domains, many of which appear to be compromised WordPress sites. The presence of external URIs and link farm indicators suggests an attempt to direct users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 https://crysiq.ru/uplcv?utm_term=i+rejoice+in+the+lord PDF link annotation
    • http://www.look4job.gr/images/_user_na/file/23198897101.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/fuo46t9sb9umq1k550qod7p5ve/18271158992.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609710c94f3c7---19716761143.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16080b741d67cc---670572299.pdfIn PDF document text
    • http://nagymester.com/userfiles/file/pizenuvebagamuzo.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/35dpehhbi3t07gqet4k3s5jfr3/gawokulojobikiteminem.pdfIn PDF document text
    • https://postelezmasivu-ostrava.cz/ckfinder/userfiles/files/lefizujopiwadipenugusu.pdfIn PDF document text
    • http://rollfactorytogo.com/uploads/files/59317257485.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/0uinj39bkt417uivic1ns9k0d7/gabivemozesijifiver.pdfIn PDF document text
    • http://adirondackseafood.com/ckfinder/userfiles/files/40855948292.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d468b04e251---35798167352.pdfIn PDF document text
    • https://shop-ecobati.com/medias/upload/files/foluvefigeberub.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079ff36a899c---zujupinuxikuguxome.pdfIn PDF document text
    • http://uitvaartverzorgingsindex.nl/images/uploads/11238712263.pdfIn PDF document text
    • http://gongotour.com/FileData/ckfinder/files/20210624_396E1559D3703314.pdfIn PDF document text
    • https://zlatartopalovic.rs//files/40071619020.pdfIn PDF document text
    • https://www.idahomedia.com/wp-content/plugins/super-forms/uploads/php/files/6408ea428644087e1ac43f12d612c30a/68813199030.pdfIn PDF document text
    • http://heydarbaba.org/resimler/files/jajazematisepogepaki.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/c21c54c1569ebff9c9d2e28368014e83/vuredejujutazunupalepe.pdfIn PDF document text
    • https://rajatotogroup4.com/contents//files/pojiboluludokanenegexan.pdfIn PDF document text
    • https://unosms.us/userfiles/file/61321241107.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/f9198adf73c39c28b66c87ae3ff1fd59/vuwodamefuleromezis.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bed9b1e711---44444415725.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_off00014b61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B61 17036 bytes
SHA-256: 52f74d13cdb255eb1f24fb1a12e82556de44948a11781d7fa954249a67543db9
font_01_sfnt_off000177b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x177B2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00018fc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18FC9 10220 bytes
SHA-256: 2ec50791a0eaad0b5480d498d51e1d618a861ab6cacf71a12b1f4dc67dc49227

Open this report in the interactive analyzer, or submit your own file for analysis.