Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e92d9ba394a57af…

MALICIOUS

PDF

91.6 KB Created: 2021-06-29 03:59:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: d97647cbbd0a4993c34541555fb0d88c SHA-1: 54553c061e971919e85841b19e9e7d3eaa916ba8 SHA-256: 0e92d9ba394a57af9dcbd78d2b8084a4ac7ae8b2bdf620ba1f767a4f70ed3513
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics identify it as a link farm, with many URLs pointing to potentially compromised or disposable hosting. The PDF structure and numerous external links suggest it is designed to lure users to malicious websites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/ca007e8bab90882d90d278786f7567f8/38944003623.pdf In PDF document text
    • https://cvconstructionsgoa.com/pharma/admin/userfiles/file/83815056086.pdfIn PDF document text
    • https://iamtimeshare.com/userfiles/file/90238485134.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb20e720bb---wuradiganodum.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609190352a6de---naxafafaxov.pdfIn PDF document text
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/054fde13daa5d53e5260501315d82716/vujavokuxotasiginazog.pdfIn PDF document text
    • http://flirdining.com/uploads/files/766993036.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7549cd5fa2---85073971500.pdfIn PDF document text
    • http://malbreil.com/userfiles/file/88531920292.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/ce9dd26df12fc8467237c1180b87051b/84321861089.pdfIn PDF document text
    • http://wamer.org/userfiles/file/12766830894.pdfIn PDF document text
    • http://transinfosoft.com/userfiles/file/lumatikajiwuno.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/751c5a01656a84133ab0ac403db97c35/raforubewededakag.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160807b06e9296---29855928466.pdfIn PDF document text
    • http://hiddenforrest.net/clients/76790/File/sukufexuluja.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c87d6e71233---41236725652.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607d47629f435---5695821917.pdfIn PDF document text
    • https://soltendance.com/stockages/files/83124845519.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=nfl+thanksgiving+halftime+showPDF 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_off0001032e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1032E 10784 bytes
SHA-256: e47d6865deecba2d36890f55344ce8b49834d8ba94e77642ac35b9c094e283a4
font_01_sfnt_off00011be2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BE2 17464 bytes
SHA-256: e3b9d7d51c3cde493d00b2a916da04773a6806944864f1bba02f22a55fa64cd2
font_02_sfnt_off00014979.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14979 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1