Malicious PDF — malware analysis report

Static analysis result for SHA-256 572f7a8269855c84…

MALICIOUS

PDF

88.2 KB Created: 2021-07-21 00:49:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ca6efc7efd2d828ae2bf1ed9d3015e2e SHA-1: ad62f9b9576154f6c8a2e4d0af27434a13908605 SHA-256: 572f7a8269855c84d348b57cd423bd1d99685619fabc1901063a4896c12cf96c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised CMS upload locations and disposable hosting, suggesting an attempt to distribute malicious content or phish users. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution campaign.

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://houstontca.org/Content/uploads/files/73417529048.pdf In PDF document text
    • http://zionhillfirstbaptistchurch.com/clients/73368/File/bajuzuwanibukowizo.pdfIn PDF document text
    • https://landatur.com/files/galeria/files/bujaxobufazax.pdfIn PDF document text
    • http://weddingdiy.cc/uploadfiles/files/20210612_211224_8105.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/090aa7b48568839b5d11cb9c83a0b96d/3264410344.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2b16821c3d---gazanekem.pdfIn PDF document text
    • http://vidol.nl/userfiles/file/89982447134.pdfIn PDF document text
    • https://grup-insaat.com/userfiles/file/47511078417.pdfIn PDF document text
    • http://harrisonfamilyreunion.org/clients/868801/File/lepuwugimukivifib.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/48194e97b711f35511b4103c86a75751/gosogurodix.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/jinamiruf.pdfIn PDF document text
    • https://euforbiabulgaria.com/uploads/pages/files/56527044946.pdfIn PDF document text
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd2aca5bca---75584528275.pdfIn PDF document text
    • http://lamorenj.com/userfiles/files/fabuwefave.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/87cm1rmf1le0foaofgsj24tupf/55155435100.pdfIn PDF document text
    • http://fritz-fahrlaender.ch/download/4992026442.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16087562beccea---65560195356.pdfIn PDF document text
    • https://j26clean.com/upload/files/sinerawanebosesadedipero.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16088851af2a03---zapafasuwazibuginigowixap.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c96a61fe92---30794909162.pdfIn PDF document text
    • https://lawyerupsmart.com/tempimg/file/mogumonifimekufadeze.pdfIn PDF document text
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606f571b76181---misaremagid.pdfIn PDF document text
    • http://www.jobsincrete.gr/images/_user_na/file/guzarejibiwadabofujulozo.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a074afa9c75---kuwitabobawujojefekoj.pdfIn PDF document text
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/4acb5690de0ff2ecb670d9f328d5860d/fefokotaboguvelule.pdfIn PDF document text
    • http://pomocnaukowa.net/Upload/file/81230395937.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=what+does+it+mean+to+cash+out+on+cash+appPDF 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_off0000f428.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF428 10728 bytes
SHA-256: 11af3c9fc2e00c074f4db4325ea9b26cff865782ebaed07d19325817ff4bcd87
font_01_sfnt_off00010ca5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CA5 17036 bytes
SHA-256: d9ceee9200617cb8c40a5f1f41cf660118585d7eb4d91344f83e3437e2d97995
font_02_sfnt_off00013937.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13937 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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