Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc49092800334575…

MALICIOUS

PDF

80.7 KB Created: 2021-09-10 18:16:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 18c8b210b4978b2b5e573f4ba74cebfb SHA-1: d8dc35a97c6a718ce04586ac9ed6d88324783204 SHA-256: cc4909280033457574db47b06fa4456884f3730cc421f6cfe1ac7263cc39eccd
156 Risk Score

Malware Insights

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

The PDF document contains a link farm pointing to multiple compromised websites and disposable hosting, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs and the heuristic firings suggest the primary goal is to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://sunwayhk.com/louis/STARKGROUP/ckfinder/userfiles/files/buturisexekilumijavites.pdf In PDF document text
    • http://geodavidepini.it/userfiles/files/62176162795.pdfIn PDF document text
    • https://kingyao.com/uploadfiles/files/20210907_073207_4549.pdfIn PDF document text
    • https://mokhalasati.com/userfiles/files/xitapaze.pdfIn PDF document text
    • http://carlaschroyen.com/content_docs/sumisibimikikaridusosaga.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/4f01728d418ecda302b1a50451b4cf9f/zisata.pdfIn PDF document text
    • http://chongthamphucthang.com/images/news/files/fokorewuzogame.pdfIn PDF document text
    • http://studiofelician.com/userfiles/files/wadokum.pdfIn PDF document text
    • http://moonlightmontessori.com/upload/files/60077900727.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/a73451d8d92f3837eadf20fa847bc7f8/kidakijumuzorapef.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/86079366282.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b4d09b9dff---sonivalunumamufomovudob.pdfIn PDF document text
    • https://shen-su.eu/gfx/userfiles/files/suxipo.pdfIn PDF document text
    • http://jmvlpslimited.com/ci/userfiles/files/toluxafejuxoxu.pdfIn PDF document text
    • http://edilcfcostruzioni.com/userfiles/files/49404613244.pdfIn PDF document text
    • https://thokhoavietnam.com/upload/files/sexefepilogewudunajudi.pdfIn PDF document text
    • https://taksis.lv/taksis/userfiles/file/sazavunuvajokoxafekuxe.pdfIn PDF document text
    • http://xn--12cmi2byac9cdhd0hra6d7bxkwbgj1gch.com/user_img/files/zoxadunonupodufanakuwiki.pdfIn PDF document text
    • http://phuquytravel.com/nguyenvanlinh/files/31802789055.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/d7c8bf14ddc62b8f29e5560ba481c742/46505170947.pdfIn PDF document text
    • http://cuoredicane.it/userfiles/files/donopitasefutidojarolut.pdfIn PDF document text
    • http://jeanthompson.nl/ckfinder/userfiles/files/zomezebono.pdfIn PDF document text
    • https://gaadalagi.com/contents/files/tolasulupise.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=sonos+android+applicationPDF 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_off0000d559.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD559 18612 bytes
SHA-256: f6af4505727fe5d3e0244b56be91c90af16d1bcbc8b1a96f942ca97f80683525
font_01_sfnt_off000105b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105B8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011dcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DCF 10452 bytes
SHA-256: 4ff366828a176f868c5505750ee8498903990fb377d4f97167565c703a4d8807

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