Malicious PDF — malware analysis report

Static analysis result for SHA-256 94a2025e581b5995…

MALICIOUS

PDF

80.6 KB Created: 2021-09-21 21:23:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 0fa3d98dad3fb10d0f8ea76be25367cd SHA-1: 041638d01587adb5b71c3f9b2f43a5212a8da1ee SHA-256: 94a2025e581b599554e6fc0cc454f62522e285d091011ec547701a4061991286
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous external links, with one heuristic specifically identifying it as a link farm on disposable hosting, suggesting a phishing or malware distribution lure. No scripts were extracted, but the presence of multiple unknown URLs points to a potential download or redirection mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/2c6e3513d99379a3b1805abe8c9243c8/xabaxazagilatuwitejezotot.pdf In PDF document text
    • http://jfe.hk/userfiles/barifumozigi.pdfIn PDF document text
    • http://rosabaum.de/web/editor/files/30602674197.pdfIn PDF document text
    • http://robvancampen.nl/userfiles/file/forokuzegofaxafovo.pdfIn PDF document text
    • http://stellar.ru/ckfinder/userfiles/files/xiraropidemifitudedu.pdfIn PDF document text
    • https://clove7.com/userfiles/file/37302337494.pdfIn PDF document text
    • http://www.trackls.com/application/ckeditor/ckfinder/userfiles/files/bebogabaku.pdfIn PDF document text
    • http://tramtronbetong.com/uploads/userfiles/file/95901815931.pdfIn PDF document text
    • https://dynasty888.com/image/files/20210917_053238.pdfIn PDF document text
    • http://daming-school.com/userfiles/file/virivovonejizoxe.pdfIn PDF document text
    • http://smsalumni1971.com/apadmin/uploads/userfiles/files/69157634353.pdfIn PDF document text
    • http://quimicahj.com/admin/userfiles/userfiles/file/13168191059.pdfIn PDF document text
    • http://musorcentrum.around.hu/files/article/file/zewosazamobupinow.pdfIn PDF document text
    • http://transchem-tech.com/Uploadfiles/files/84677071889.pdfIn PDF document text
    • https://nezrenweb.com/calisma2/files/uploads/8512235971.pdfIn PDF document text
    • http://brkvinc.com/userfiles/file/64470195181.pdfIn PDF document text
    • http://ues-rb.ru/themes/ues-rb.ru/files/biloxavona.pdfIn PDF document text
    • http://tsrmvolontari.it/userfiles/files/29363972813.pdfIn PDF document text
    • http://biosurfest.com/userfiles/files/53157484094.pdfIn PDF document text
    • http://hoilhpnqbthanh.com/upload/file/tutifotuwekopotoso.pdfIn PDF document text
    • http://darangyi.com/userData/board/file/71349261057.pdfIn PDF document text
    • http://ehomeforeclosure.org/images/file/bomikotebibik.pdfIn PDF document text
    • https://www.singaporemedicalclinic.com/ckfinder/userfiles/files/dikelufajuvonaku.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=react+native+with+genymotionPDF 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_off0000d5dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5DD 10676 bytes
SHA-256: 31332e4e6ba6f98377970bd2717f757be0ad0855052135df476bf7ce6e1f2f7f
font_01_sfnt_off0000ee37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE37 17628 bytes
SHA-256: bc678c29d5ebe4e4f37a8fa07a0060b897832d7b2cf9c7bd26057c5f344c6cae
font_02_sfnt_off00011c7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C7F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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