Malicious PDF — malware analysis report

Static analysis result for SHA-256 69caf8d7f311c5c0…

MALICIOUS

PDF

87.4 KB Created: 2021-07-03 10:19:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 7726cceb9fc5fce98de5cfbaa478e80c SHA-1: 96a936430574d7404d11cba50c08117e81f71acf SHA-256: 69caf8d7f311c5c030fc3d78005d5c06ee7590cab0a55b3a0b1cbbf72e450730
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to numerous external URLs hosted on potentially compromised or disposable domains. The primary goal appears to be redirecting users to malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://netflor.pl/upload/File/dukekonowajewusiraditofoj.pdf In PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/pepugesexelaravapanuvi.pdfIn PDF document text
    • https://avigailpekelman.com/sites/default/files/file/lulasaxofezevow.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab3fd5df158---10005541870.pdfIn PDF document text
    • http://datavincity.com/uploads/ckfinder/files/18864202505.pdfIn PDF document text
    • http://dichvugiayphep.net/hinhanh_fckeditor/file/45042610182.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/5324235cf166a5e57e60dec94acf7eeb/jifejexulogopavadozi.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607c07d217b15---88169878043.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16080072ab6693---kosatun.pdfIn PDF document text
    • https://codecs.ro/images/file/59033888462.pdfIn PDF document text
    • https://beautyyaurient.com/editor_upload/file/bujefolategavapuwaxedop.pdfIn PDF document text
    • http://assushop.com/userfiles/assushop.com/file/86265747657.pdfIn PDF document text
    • http://logiccpacma.com/ckfinder/userfiles/files/xobowemurawev.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/3qcdpcjc0dj1du5ufqgp5k3knn/tinogikozogawututaramisi.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/2857236b28d7fba3a33e14f5ade7300e/vanubozokebinexidi.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/a9b8gtckfukq68n1kbe08hke87/97241142278.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/i7rcu98mghutlf77ogov23evr3/kozubikeduvavefunuvaviwo.pdfIn PDF document text
    • http://commandhousecreations.com/uploads/files/rowigowuv.pdfIn PDF document text
    • https://nabijdefossa.nl/upload/files/42236643054.pdfIn PDF document text
    • http://jr-bang.com/uploadfiles/20210608043137.pdfIn PDF document text
    • http://nesthomes.in/userfiles/file/zosera.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/76d9cb0754269a867cf9491416ca0679/voloxililogakused.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/48ce2c85b89d4c69b68b30356392574e/28537931273.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bec61d1cc8---44151694238.pdfIn PDF document text
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/7a045b59308ec1a49c0f01deebd0bde2/43316108596.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16075c31205723---17626467658.pdfIn PDF document text
    • https://ghnservizi.com/file/tagisigixerolajunek.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=moral+experience+meaningPDF 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_off0000f496.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF496 16912 bytes
SHA-256: 33326b8aa6508133690e27c3a61dc1ff9e396ad96f2a3bded0fb0711096744a6
font_01_sfnt_off00012060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12060 10544 bytes
SHA-256: b8f549e1c6585c8af3ee4dabe02fb11287562633313d517c4a74ff0411f0ce96
font_02_sfnt_off0001385b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1385B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1