Malicious PDF — malware analysis report

Static analysis result for SHA-256 29a59b38eca371d9…

MALICIOUS

PDF

83.7 KB Created: 2021-09-07 19:59:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 80e01b6877d35a116acb446336b49c92 SHA-1: 4cf7e5733ee1e0c1bf698daa2567b231dd92d5bc SHA-256: 29a59b38eca371d9bc7155e818a7f3be2f36c97c912f8475226543084d302a61
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

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://archism.ru/uplcv?utm_term=driver+manual+nj+test PDF link annotation
    • http://briztravel.com/upload/files/82445489096.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608d55006c984---44636635436.pdfIn PDF document text
    • http://geologicatoscana.eu/userfiles/files/71918539843.pdfIn PDF document text
    • http://hermangroupcorp.com/clients/3/38/389628ddbd62db2fa1e4299ecdfc1861/File/bozakisuz.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/benagabap.pdfIn PDF document text
    • http://vyveva.eu/UserFiles/File/tubezo.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/b8ete7hv76dmeu0lgoeruobkl1/67248865055.pdfIn PDF document text
    • http://ccspatti.org/userfiles/file/kurugivesop.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609283a79b45c---zudajumifiwiwezenuket.pdfIn PDF document text
    • http://zae.me/datafiles/file/17269339346.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/46936672615.pdfIn PDF document text
    • http://salamino.pl/userfiles/file/50333181481.pdfIn PDF document text
    • http://keigan-productions.com/clients/863431/File/84952336036.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160703df4a8b1d---femurukomerupebu.pdfIn PDF document text
    • https://khabul.mn/mmpa/userfiles/files/faromaz.pdfIn PDF document text
    • http://fygl.net/uploads/file/241403306436.pdfIn PDF document text
    • http://smart-ventures.ch/upload/Editor_Images/files/wipodivoguzofududirus.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093c9bec98c0---32480949295.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/560b8b64b231d9c17eff6d89d419d036/womikujolenil.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/v8irtp21mgnfgjpv0bj6u0jt72/4854136738.pdfIn PDF document text
    • http://promocode.lu/userfiles/files/2938141255.pdfIn PDF document text
    • https://www.dynasil.com/wp-content/plugins/super-forms/uploads/php/files/5f1228dc2b1071bd524d2879540a6ebe/kawugoterunutazip.pdfIn PDF document text
    • http://portalinmobiliario24.com/uploades/fckeditorfile/gilugogevimiwoxuxu.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e57f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE57F 10444 bytes
SHA-256: b1dceeb23f85161069f7ab18cdfd595ace7e2c09ddf539e925cf95ddd80c2326
font_01_sfnt_off0000fd29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD29 17128 bytes
SHA-256: e8caecfa8cc10e5a416fc5bc5a5b8b8bd6c506aa61d757da306d4a857d0546a1
font_02_sfnt_off00012972.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12972 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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