Malicious PDF — malware analysis report

Static analysis result for SHA-256 69d4e687ccab6c45…

MALICIOUS

PDF

83.1 KB Created: 2021-09-21 00:28:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e38a2a3a9dae75b9b614b8e3a712c68a SHA-1: 8600438dbd1e672423812bf102cdc221a37c1b64 SHA-256: 69d4e687ccab6c45cd452a7772c88d2c3b88a81f4e7bdaa3bc695d468af2f162
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious. It contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of these links strongly indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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://coretry.ru/uplcv?utm_term=how+to+make+api+for+android+app
    • http://kelvista.lt/images/files/27935642888.pdf
    • http://www.s-prom.si/fileupload/file/gomupo.pdf
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613c3e6cd42e8---45790413977.pdf
    • http://mygotour.com/FileData/ckfinder/files/20210903_7F31268BCB263C9C.pdf
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/16141f470c0af8---zaravixivi.pdf
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614468608d8de---31463461668.pdf
    • http://sevennews.com.br/ckfinder/userfiles/files/31011043014.pdf
    • https://triptoboloyfoundation.org/editorsfiles/files/ralomemusexojobikezopiv.pdf
    • https://decoveinvestment.com/userfiles/file/13157287201.pdf
    • http://orthodoxnews.us/file/66725179215.pdf
    • https://restavracia02.com/userfiles/file/divuwetupegobetam.pdf
    • https://cowichanmusicfestival.com/userfiles/file/20669467103.pdf
    • https://kungfuclasshongkong.com/louis/taichi/ckfinder/userfiles/files/puminavaxafukafokegilu.pdf
    • http://rainhouse.kr/data/editor/file/6046003196145db2ea51a8.pdf
    • http://a-xian-coat.com/uploads/files/202109011857196351.pdf
    • http://mobilesamara.com/img/files/file/81686854175.pdf
    • https://kenkochaya.com/user_data/ckfinder/files/dujutipuvotopilonava.pdf
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16132b620be752---mipeza.pdf
    • https://ascii.tn/web/cgi/file/60524380559.pdf
    • https://snapstudios.ca/userfiles/file/fuporijodo.pdf
    • http://bajkolandia-leszno.pl/userfiles/file/nejijimuwawupedafu.pdf
    • http://bippex.com/filespath/files/20210917183758.pdf
    • https://loonbedrijfschimmel.nl/userfiles/files/41200310779.pdf
    • https://morethancars.eu/uploads/edytor/file/49672145054.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e22c.bin
0f8c31296f45c8a24eeae445d7d1e225f6d4ac01757c72e89f07661807ab27c0
pdf-font-stream PDF embedded font (sfnt) at offset 0xE22C 10616 bytes
font_01_sfnt_off0000fa61.bin
3722d1cfaffb088dbfb731d4ece6783b2ca5bdca9b1a6de1651af4c7e982105c
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA61 16916 bytes
font_02_sfnt_off00012632.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12632 16792 bytes