Malicious PDF — malware analysis report

Static analysis result for SHA-256 32bc84117d937eb4…

MALICIOUS

PDF

74.3 KB Created: 2021-10-01 16:45:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 55060eb163a45f97a0753069d21208b8 SHA-1: 81b913dd4988404b9a6519927ddcfd1165d97434 SHA-256: 32bc84117d937eb4d93064402e97336f2c36ac501bfff8793b1e2a5fe96b236b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external URIs and is identified as a link farm on disposable hosting, suggesting it's used to redirect users to potentially harmful websites. While no scripts were explicitly extracted, the PDF structure and external links point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://infrive.ru/uplcv?utm_term=new+galaxy+fortnite+skin PDF link annotation
    • https://sanghvicranes.com/staging/media/16087938196.pdfIn PDF document text
    • http://gocoachfox.com/userfiles/file/55041446233.pdfIn PDF document text
    • http://xsteelstock.com/d/files/27327991711.pdfIn PDF document text
    • http://flapboxes.com/userfiles/files/59931504576.pdfIn PDF document text
    • http://www.smartusb.info/images/library/File/71586436149.pdfIn PDF document text
    • http://xn--h1aaebajlcgx.xn--p1ai/sadm_files/dezegelufusijulov.pdfIn PDF document text
    • https://badanie-wody.pl/galeria/file/10190807228.pdfIn PDF document text
    • https://semineebrasov.ro/printuri-fi/files/panuduwezalamuberobebafux.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/5ef4736adf0773d6418940b99950ef5a/bopefajizatuwi.pdfIn PDF document text
    • http://staropolski.net/Upload/file/zijinisololexeg.pdfIn PDF document text
    • http://eptesteplelek.com/uploads/file/77684516830.pdfIn PDF document text
    • https://osikovo.eu/webroot/img/content/files/getafunupuvu.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/0lg9fce7rbvqb7bevq0ngu96l1/40442052018.pdfIn PDF document text
    • http://everest-c.ru/ckfinder/userfiles/files/bokatapot.pdfIn PDF document text
    • http://jarosi.hu/files/file/89144203653.pdfIn PDF document text
    • http://lienming-rubber.com/uploads/files/202109221142134912.pdfIn PDF document text
    • http://shengnabei.com/uploadfile/file///2021092721231086.pdfIn PDF document text
    • https://12shio4.com/contents/files/fuvamiliromexifupexizi.pdfIn PDF document text
    • https://ilonew.tasksplan.com/userfiles/files/57293127323.pdfIn PDF document text
    • http://entryexpress.online/chapter_images/files/napukemesu.pdfIn PDF document text
    • http://psychologyforeverybody.com/ckfinder/userfiles/files/diguwokakuturane.pdfIn PDF document text
    • http://seamacros.com/upload/file/xeten.pdfIn PDF document text
    • https://bdaudit.ro/userfiles/file/72199823611.pdfIn PDF document text
    • https://home-consult.lu/userfiles/files/90846754360.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bc9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC9D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d4b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B4 10760 bytes
SHA-256: 5a95f8bedfa8c2fd79113da0a07489bf6ffd0b77ca9b084f1ddbacc976049c29
font_02_sfnt_off0000edae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAE 17864 bytes
SHA-256: 8ddb74d091e60b6293c6c4d06e8a892fefa946f216803910c73e7330e1600d5a

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