Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ede8136d72aefea…

MALICIOUS

PDF

82.9 KB Created: 2021-08-24 22:53:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: f20320b0237dc348652dd72a90714247 SHA-1: b392fe9eaddfd4e346c39e8ff15dbc0298defbdd SHA-256: 7ede8136d72aefea7b118535c9e2b3664c838473183e5621f05c92e01f980f19
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a link farm hosted on compromised or disposable domains, indicating a phishing or malware distribution attempt. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic suggests the document is designed to trick users into downloading a password-protected archive, likely to evade initial security scanning. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://clubselectionvoyages.com/images/file/99119516617.pdf In PDF document text
    • http://romengo.com/ckfinder/userfiles/files/75141997299.pdfIn PDF document text
    • http://konditsionery-reutov.ru/upload_picture/file/46940648268.pdfIn PDF document text
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/tl2bnpaes9ord338jopg4rula4/1079065062.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/7f8a6990fc0eba3346778d5e5474d28b/kuzozis.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d2ffd44e75e---keboxinewipelufaworeva.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079aefab7d7a---sufadizezupujenilapeto.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/f90fc80d769227d3a77a4d53e45d5ec2/15396981438.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160775ed2c22e1---75930456962.pdfIn PDF document text
    • http://www.alexgis.com/siteuploads/editorimg/file/navadivosijuzegatetabaxi.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/19def8972f88a06974fcbdd0937f29f2/koripisapofoxod.pdfIn PDF document text
    • http://banglatalkies.com/dynamic-images/cms/file/95352786219.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f12be9d4d9---1330951498.pdfIn PDF document text
    • http://rajskiewakacje.pl/userfiles/file/xirejam.pdfIn PDF document text
    • http://toanthinh.vn/webroot/img/files/nimaxelujixelopugaloviw.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/96ad98b38d4f091fa5fb4c047d5786f4/38379100504.pdfIn PDF document text
    • http://maezawa-jidousha.com/js/upload/files/zakafow.pdfIn PDF document text
    • http://yourhealthyanswer.com/ckfinder/userfiles/files/1809565594.pdfIn PDF document text
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/16087f4de70861---fivuwomabemuse.pdfIn PDF document text
    • http://drentmedischadvies.nl/uploads/files/46573082230.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607122d2065dd---burajodaragojadosinonutiz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=crack+pdf+protected+filePDF 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_off0000dd5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD5A 17680 bytes
SHA-256: 151b01a140efcf3a44faa08afcf842f922a0756ff184f3ed15938e6a74ea3d3b
font_01_sfnt_off00010c14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C14 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001242b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1242B 10464 bytes
SHA-256: 7dab518cc099d7e1ca8c4d45165ad7f2ddf8b96c11c0bbb9f8a38c06ffb50466