Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec8bc980cf06d7bf…

MALICIOUS

PDF

87.4 KB Created: 2021-09-05 04:04:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0cdcd26c89fb7a2b15af1e8a924c4388 SHA-1: b9b65c172edbb94a24bb0396d1de369b6653a969 SHA-256: ec8bc980cf06d7bf7e85459138ba23297132df2bb7a3e26dc1507e0e3313c8dd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The presence of these links suggests an attempt to lure users to malicious websites, likely for phishing or to download further malware. No scripts were extracted, but the structure and URL patterns are strongly indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://carsongrad75.com/clients/3/35/35717660c32d3dd9b0ffde8f33a19d23/File/19645560888.pdf In PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a49d6d4efeb---10426641893.pdfIn PDF document text
    • http://jaatkinson.com/userimages/2263240818.pdfIn PDF document text
    • https://carsen.sk/editor_uploads/system/files/vivezutudopomu.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090b6113cd0f---pizezutexifopaz.pdfIn PDF document text
    • http://marjoleintje.nl/include/userfiles/63926492831.pdfIn PDF document text
    • https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610500f4a2716---suguxajilubejaza.pdfIn PDF document text
    • http://ingenermarket.ru/userfiles/nowijowafiretupu.pdfIn PDF document text
    • http://budohurtsa.pl/userfiles/file/36033429825.pdfIn PDF document text
    • http://amblesidewindermere.ca/fckuploads/images/file/regoza.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612922343dde6---52940847386.pdfIn PDF document text
    • http://pomocnaukowa.net/Upload/file/sifutalugalajarixo.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//mitojogumegesa.pdfIn PDF document text
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092b360e761f---towodod.pdfIn PDF document text
    • http://carszana.com/image/upload/File/66007319929.pdfIn PDF document text
    • https://cribpointonline.org/cribpointonline/userimages/file/19818834415.pdfIn PDF document text
    • http://indago-rovigo.it/userfiles/files/33718026128.pdfIn PDF document text
    • http://www.almansori-ye.com/almansorifiles/files/fojonaronipuwaz.pdfIn PDF document text
    • http://fcv-bo.org/data/fcv-bo/userfiles/file/ledipilukoratep.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160823d8d9e4e2---51998737125.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c36c8755a76---besuxezimomaso.pdfIn PDF document text
    • http://firmen-bekleidung.at/userfiles/file/fisuladix.pdfIn PDF document text
    • https://activepymes.com/pub/file/libevu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=warszawska+karta+miejska+wniosek+pdfPDF 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_off0000ee09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE09 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001061b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1061B 19400 bytes
SHA-256: 973a4dd1a3cda4b11886a4f454cf2a218eb3de5773e22f7a1e3a8e16f52fc3c5
font_02_sfnt_off000136ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136AE 10972 bytes
SHA-256: 4ece39a716ea6f0423126824d793163b92921758be790cd6674f07f062994833

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