Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cf328e131e5c678…

MALICIOUS

PDF

83.9 KB Created: 2021-09-09 12:55:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 6d0966ff831f24c40b3881a577056721 SHA-1: 36d5a09fde22d6cbe6f931b67feb4e82e939864d SHA-256: 3cf328e131e5c678bd412afcaa323147324a5bda9f052014790dca8572a826df
126 Risk Score

Malware Insights

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

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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/161376d0663491---9853402554.pdf In PDF document text
    • http://pc75.net/upfiles/file/1630757482.pdfIn PDF document text
    • https://kme.pl/global/app/webroot/uploads/file/16311417317604.pdfIn PDF document text
    • http://jtravel.clickis.kr/FileData/ckfinder/files/20210908_1F011709B18FEDA0.pdfIn PDF document text
    • https://jasz-pap.hu/UserFiles/file/tilorufisofaban.pdfIn PDF document text
    • https://badanie-wody.pl/galeria/file/pimuderig.pdfIn PDF document text
    • http://margheritango.it/userfiles/file/kadumunulanuxid.pdfIn PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/26461137637.pdfIn PDF document text
    • http://tobn56.com/UpFiles/file/17570413075.pdfIn PDF document text
    • https://bitree.ru/ckfinder/userfiles/files/zogukemizurepiregenajak.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16132b3a75bf4b---3734777850.pdfIn PDF document text
    • https://www.dogandemir.av.tr/paketler/ckfinder/dosyalar/files/60356288903.pdfIn PDF document text
    • http://www.yeosung21.or.kr/ckfinder/userfiles/files/1630483036.pdfIn PDF document text
    • https://reclamesticker.nl/images/uploads/file/In PDF document text
    • http://master-br.ru/img/file/8750483084.pdfIn PDF document text
    • http://edu-family72.ru/content/images/uploads/file/25144728927.pdfIn PDF document text
    • https://52fantasies.com/home/holly/public_html/ckfinder/userfiles/files/25572401728.pdfIn PDF document text
    • http://csc0512.com/userfiles/file/20210908155614_a0bl8m.pdfIn PDF document text
    • http://stigstudiotecnico.it/userfiles/files/podixipibifopopi.pdfIn PDF document text
    • https://drlanda.hu/user/file/vadapedujixigeji.pdfIn PDF document text
    • https://dangeloremodeling.com/nbloom/fckuploads/file/vuxuzezosazagawexi.pdfIn PDF document text
    • http://lovepetclinics.com/file_media/file_image/file/daxiposaputamatuserobeki.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=watch+i+saw+the+devil+eng+subPDF 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_off0000dd2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD2B 10816 bytes
SHA-256: 24ed01a876f95afef5217ebe016610e6c81196e0005df81480c77f7578f85780
font_01_sfnt_off0000f5e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010dfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DFB 19796 bytes
SHA-256: 28a1b947ee580e35de67740856f035e96612242cb8daf70219dd02c6460cb20d

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