Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dcebc60d02766b1…

MALICIOUS

PDF

90.7 KB Created: 2021-07-08 01:48:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 3e7af296870dca1c2e08c91ecab2bc81 SHA-1: fc67bcc7717732fcc0b6e1f3cf6f5be9822e0738 SHA-256: 6dcebc60d02766b1a21d36224d78ee35ab38ed327e56d26b8f2088fdb3762cb4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting it functions as a link farm to distribute malicious content or phish for credentials. No scripts were extracted, but the structure and URL patterns indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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 https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/1kf0r7c0ihfro8kj0a0n0ohp9u/46137890602.pdf In PDF document text
    • http://www.awakohchang.com/image/upload/File/owovakapobuxuxojum.pdfIn PDF document text
    • https://kogan-photo.ru/wp-content/plugins/super-forms/uploads/php/files/12363bad0e082764fc9781e2baffe024/12205366284.pdfIn PDF document text
    • http://pwr-tech.ru/userfiles/file/rojizavusawenura.pdfIn PDF document text
    • http://paliukenas.lt/i/File/20200928937.pdfIn PDF document text
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/f31279e06b0b7a541d8c67117897db1a/sulowivatofikoz.pdfIn PDF document text
    • http://eko-inwest.eu/upload/file/tilodotuduvutot.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16094126753080---jitatefabazabo.pdfIn PDF document text
    • http://caigeshi.com/uploadfile/file/2021052810170473499.pdfIn PDF document text
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093ff054dd9b---pawigovoveforejavowag.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160e4abcfb0a15---kenumad.pdfIn PDF document text
    • http://ozdoby-betonowe21.pl/Upload/file/koguwonu.pdfIn PDF document text
    • https://binarbaidtrading.com/public_html/userfiles/file/20126993165.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/1iu6l6fpg67vb8i9u558krnrpq/33317638808.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609197d7f018b---46225892008.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/3le6ctt3f859911gojabgm2rg3/rinejitamofok.pdfIn PDF document text
    • http://stsaischoolamritsar.com/slbdavbatala/userfiles/file/10604414721.pdfIn PDF document text
    • http://norilskgu.ru/userfiles/file/jevewajolapixuxe.pdfIn PDF document text
    • https://cochleartudaskozpont.hufiles/6097282369.pdfIn PDF document text
    • https://rubin2000-distribuitorshop.ro/userfiles/file/48211620955.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609439624fc30---dibarevovaz.pdfIn PDF document text
    • http://pujcovnanaradi-tvarozna.cz/userfiles/files/vamozobizofaruberukonuwax.pdfIn PDF document text
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607448b6bf22d---1802221973.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=test+of+economic+literacy+answersPDF 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

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_off00010172.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10172 16728 bytes
SHA-256: fdac76ef29984d4f29cff64c380dc4a9cf0390a2eb36c91fd7b52fdee6e99604
font_01_sfnt_off00012cf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CF7 10660 bytes
SHA-256: 703fd3e0ba31adf8f6089db294271692f3bf2527079d9b3b458b25b2279f6581
font_02_sfnt_off0001457b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1457B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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