Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1f4db47b82af04a…

MALICIOUS

PDF

90.9 KB Created: 2021-07-18 14:09:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 9dc2d7728b1accd62bb98a72113e760b SHA-1: 66ceccd1d7ad8e043ed75770957d2e5af8661b91 SHA-256: c1f4db47b82af04addb690547348fcb76fdc811912eebe79c7e9a668730bc9ff
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised or disposable domains, a common tactic for phishing or distributing further malware. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were extracted, the structure and URL patterns suggest this PDF is designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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 http://rsst77.ru/upload/files/tozoxawifatetedazew.pdf In PDF document text
    • http://fygl.net/uploads/file/160934301323.pdfIn PDF document text
    • http://przedszkolenisko.pl/userfiles/file/robuloraz.pdfIn PDF document text
    • https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/f6c3fdb11c2ab6b776ba5b63afa94e60/rujetatuvugevajejizukano.pdfIn PDF document text
    • https://drsubhashawale.com/ckfinder/userfiles/files/12356449021.pdfIn PDF document text
    • http://panhongbo.com/ckfinder/userfiles/site_eachfun_com/files/gavojefezu.pdfIn PDF document text
    • https://jetaime-shop.com/files/72340039018.pdfIn PDF document text
    • https://biogenetixpharma.com/ci/userfiles/files/xogavogoworizawavitipepax.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d2445e7a05b---57401081948.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/t68hus5gg5jcdbt18bencidols/22209478692.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/74f56c15f43ed595004c0d4411c3515b/31826186237.pdfIn PDF document text
    • http://anandamsanyal.com/userfiles/file/pufuxo.pdfIn PDF document text
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/af2f854fee959dc96288ce7102f98592/penirodugoji.pdfIn PDF document text
    • http://sva-jeanroze.com/xmedia/file/popasenazavak.pdfIn PDF document text
    • https://office-agglo-larochelle.fr/userfiles/file/10556120281.pdfIn PDF document text
    • https://www.passion-rnd.com/upfile/files/2021/06/15/tanavinolafodalosom.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4c96f0df27---kufobikubamase.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/jelafopunirubazapesejif.pdfIn PDF document text
    • https://jeneifogaszat.hu/cikkdata/files/doxibo.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf3e40fb55---90604226191.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/8868ad6c63974355f30e21b4cc7ff76d/7583029015.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=watch+justice+league+the+animated+seriesPDF 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_off00010059.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10059 10920 bytes
SHA-256: 3b5ee3fc63ef133f4c3c823b994bedb16648c6bdde7dc03f4618df860605ab87
font_01_sfnt_off00011931.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11931 17324 bytes
SHA-256: 06a650fd857d5c9992902eb3799901b408de1cb43d38f53c0d7f2d657c24dfa4
font_02_sfnt_off00014676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14676 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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