Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a0e5e65ce11a621…

MALICIOUS

PDF

78.6 KB Created: 2021-09-18 22:51:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9365fb11c6edad1e994499f1aec7b37b SHA-1: 142e26e76bf7ac8128e68f3b175d3068d70f9bcd SHA-256: 5a0e5e65ce11a6213a2f065c9d0b39b37c61d68e4c2717c890c87a98bfee2626
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to disposable domains, indicative of a link farm or phishing lure. ML classification and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and external URI firings suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://garglob.ru/uplcv?utm_term=snaptube+apk+download+for+android+mobile PDF link annotation
    • http://nanobubblevietnam.com/uploads/userfiles/file/46611647806.pdfIn PDF document text
    • https://ecoolteh.eu/galeria/file/24983622457.pdfIn PDF document text
    • http://facilitymanagementassociates.com/survey/userfiles/files/71688723840.pdfIn PDF document text
    • http://alburigiott.it/userfiles/files/44223431916.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f1f09948d0---72451931417.pdfIn PDF document text
    • http://ingenermarket.ru/userfiles/kotigakovek.pdfIn PDF document text
    • http://weingut-suppan.at/files/nixuxoxoteripekagadefex.pdfIn PDF document text
    • https://aradovan.com/userfiles/file/17921981651.pdfIn PDF document text
    • http://cancunday.com/travela/img/files/libibimenusuzeligeselik.pdfIn PDF document text
    • http://digitalpolicycouncil.org/imagenes/file/zikekafij.pdfIn PDF document text
    • http://huanghels.com/filespath/files/20210916044852.pdfIn PDF document text
    • http://bimbrlata.cz/UserFiles/File/97453050980.pdfIn PDF document text
    • http://highspiritsmusic.com/ckfinder/userfiles/files/penimakanawexa.pdfIn PDF document text
    • http://lse.hu/userfiles/file/18258188373.pdfIn PDF document text
    • http://dieutrimun.myphamkangnam.vn/webroot/img/files/rixilirafexu.pdfIn PDF document text
    • http://veewood.com/file_media/file_image/file/munoxegolozuwokagej.pdfIn PDF document text
    • https://speeddating.lt/speeddating/ckfinder/userfiles/files/xewivakolabemowulilevi.pdfIn PDF document text
    • http://ekhoron21.mn/uploads/files/tajelajeravujiroxu.pdfIn PDF document text
    • https://arslanemlak.com/E/file/In PDF document text
    • http://greenearthgardens.org/userfiles/56518384557.pdfIn PDF document text
    • http://kubak-ubezpieczenia.pl/userfiles/file/79419609841.pdfIn PDF document text
    • http://salman-is.com/userfiles/file/20106661823.pdfIn PDF document text
    • http://dichvuhangngay.vn/uploads/image/files/87488728290.pdfIn PDF document text
    • https://hediyelikhanem.com/calisma2/files/uploads/31991762310.pdfIn PDF document text
    • http://www.tecs4.com/intranet/ckfinder/userfiles/files/mofisinefi.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_off0000cc91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC91 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e4a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A8 10984 bytes
SHA-256: a67488a0840ce0869dcd0cba052a78db6891d67386e2da8d5f5da70bce47c156
font_02_sfnt_off0000fdf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF9 18320 bytes
SHA-256: 2127f148c2506d156b94ac251ea7c7d1ee9777f08904aeb45c1c73e675273ac3