Malicious PDF — malware analysis report

Static analysis result for SHA-256 77befadc345d47eb…

MALICIOUS

PDF

101.0 KB Created: 2021-07-13 20:48:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 462870bb87602fe490c561aff4d396e8 SHA-1: 0c00b163405a0ee5b3c1ee32a5a9b2dcaa236425 SHA-256: 77befadc345d47eb82de22e5c8f6d9f5f837ff5afe236bf97423cffec61f4c66
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs and link farms hosted on compromised CMS uploads and disposable domains, suggesting a phishing or malware distribution scheme. The presence of multiple compromised upload paths and redirector URLs points towards an attempt to obscure the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9737

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=jimin+time+of+birth PDF link annotation
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/00d84f8e9caba1ce3e7885daa8fa817d/dujakuxokamirumop.pdfIn PDF document text
    • http://1960whs.com/clients/7/73/73384dfd0d582a2861cf356c55c3c578/File/fesuvirigonuwemalukaj.pdfIn PDF document text
    • https://www.tyrtaios.gr/ckfinder/userfiles/files/801383542.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f312f3bb04---figomivaril.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160ba0396cf194---82986579338.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/9iiod76vgtds7k42qh6mjceca7/vupevomekigolit.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/fc73813fa026cf0a75684e8a3388ffdf/79012769939.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd32f7a647f---11092210021.pdfIn PDF document text
    • https://addsfly.com/userfiles/file/55252005305.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b173e7ae9b---vazefe.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/116a7dc55ec6e3e7486a0213bd8ea0c6/12957067773.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160c4a460e163c---58545615410.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/8eg08587426q8r37gguo4spd43/gupokovepijifajoro.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abf3a5a8743---70059657446.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/ed99878bf60dbac03282bb503423e8aa/sosurol.pdfIn PDF document text
    • http://auxerretv.com/content/public/file/fatajopekidof.pdfIn PDF document text
    • http://reutlinger.pl/userfiles/file/nariduvalosexazisafi.pdfIn PDF document text
    • http://0851gay.org/userfiles/202107file/2021070205032170554.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac7370d659d---votipitopagizarekilaz.pdfIn PDF document text
    • https://heks-tech.com/app/webroot/userfiles/files/19987845934.pdfIn PDF document text
    • http://nw-line.ru/generic/uploaded/defilexutalere.pdfIn PDF document text
    • http://raegcafe.com/uploads/files/25153807785.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/bbbcf2a801be901b5229f7f21bd19555/9873167060.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000107fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107FE 16296 bytes
SHA-256: 052a5ea94cffceab827814946014b96afe8b48e9519dc8061f1b61650a4d0e60
font_01_sfnt_off00011ded.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DED 17560 bytes
SHA-256: e9bd8beb2195209f3d8926a07f32ac78758c15a15576fe88f6ce786267450a45
font_02_sfnt_off00014bfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BFE 2208 bytes
SHA-256: 88d5951384180127a503fab557874949efa27a9db8305dedb80f1770ef58ad62
font_03_sfnt_off0001559a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1559A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off00016db1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16DB1 10232 bytes
SHA-256: ed6f12736b07818157a2ce9f21f2cc8bf2eb14fbc6af3585679a0b6bebb8c79f

Open this report in the interactive analyzer, or submit your own file for analysis.