Malicious PDF — malware analysis report

Static analysis result for SHA-256 9021e634fd08e096…

MALICIOUS

PDF

123.9 KB Created: 2021-07-03 00:55:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: c7550fc08dd356f486950445ee9d1382 SHA-1: 5bb26f573262043a64f6384e16810d51ef863e9f SHA-256: 9021e634fd08e09621a87b869512da30ff842f40c131473d89dea9fbb3464f08
156 Risk Score

Malware Insights

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

The PDF file contains a large number of links, many of which point to compromised WordPress upload directories. This suggests the document functions as a link farm, likely intended to lure users to malicious content or phishing sites. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9618

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 http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160b949ed0348b---xuwiwaju.pdf In PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160846f7f0c093---72016454436.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098bfb62810f---83167740003.pdfIn PDF document text
    • http://viprealestatebrokers.com/userfiles/files/viwiniwub.pdfIn PDF document text
    • http://nw-line.ru/generic/uploaded/18077141223.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160726cdf4d753---kekodumofefojajufivanu.pdfIn PDF document text
    • http://afgventuregroup.com/cfiles/file/79381323754.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/c30586g9rqgk0rj1dbiiib5fs8/47280117689.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d1c4592979---pajiwov.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/aqko3rfeic17q3t4nd209ggsv6/1727047830.pdfIn PDF document text
    • https://bonafideonline.com.ar/wp-content/plugins/super-forms/uploads/php/files/2e9d9681a9fa4c329c9dee13ac54b0be/6798716356.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/s26fe7nl72d50srtuplsjlujs8/waxekofosovugejuresamemuw.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/160da393c5fe4b---fumuwipufavisozavop.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608285b023fd2---63660262177.pdfIn PDF document text
    • http://youngthisyear.com/ckfinder/userfiles/files/93048974895.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160921a81257f8---zuxazesolusagotituteg.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/euo5t2d27tm7lt16u4emfr7hds/sedojav.pdfIn PDF document text
    • https://mobile-translator.eu/app/webroot/media/files/62447599398.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160779cfa85f97---82580055716.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/d6670785780fbeb9cbc4169ba54d6081/butapitimowileforefe.pdfIn PDF document text
    • https://pousadamarazul.tur.br/wp-content/plugins/formcraft/file-upload/server/content/files/16081c92f22297---juwukonawetonazovewuw.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/g99f3dru8c8qi55ksj8hqf615j/vesowaxomavazopananejox.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/tpub1idpn8g95mpc2hgg1lq3oe/jusazara.pdfIn PDF document text
    • http://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/xozajedunifaxowe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=process+of+exothermic+reactionPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015e5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E5C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00017673.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17673 10660 bytes
SHA-256: c93239a856b8661b73e90fc4f84c5ee713da0c478d1efe3c4ebcbf22d52b5542
font_02_sfnt_off00018eb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18EB6 19484 bytes
SHA-256: 6f40299093178595e142ea0c98dae42b92f5d73dba10a5b12c0514c9d44dd4b8
font_03_sfnt_off0001c313.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C313 1716 bytes
SHA-256: 687b669556b0998e0e4c5ef08e2c5cbb0db941c8e0462ea9e4a6f82b88295e69
font_04_sfnt_off0001cb38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CB38 16304 bytes
SHA-256: fd831f8a239d989b17d634ff15357c15abceab4494fee6227fe5cb1b70c826aa