Malicious PDF — malware analysis report

Static analysis result for SHA-256 de005f4adeb9ece1…

MALICIOUS

PDF

80.9 KB Created: 2021-09-07 10:53:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: b3e569a384800ae6f0647331e334c92f SHA-1: 0cbd9a9bb1e58f5be6e6256f9e422159a6464208 SHA-256: de005f4adeb9ece140fb6777aacd2a9c6f0dc56555c822e65928d1e170a57381
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with techniques used to distribute malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://ceccarmehedinti.ro/userfiles/file/rilenineti.pdf In PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d6e0e967cd6---maxoxigepepivew.pdfIn PDF document text
    • https://hiddencliff.kr/FileData/ckfinder/files/20210630_0CC1F4C8A1DE3380.pdfIn PDF document text
    • http://duda-tech.pl/dudatech/upload/file/refapu.pdfIn PDF document text
    • http://www.anjhimayath.com/upload/file/nalikav.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092c7635858c---xarodivupowenabubudires.pdfIn PDF document text
    • https://thucphamtruongxanh.com/Upload/files/23700894461.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094ad6ada562---rasinotipotel.pdfIn PDF document text
    • https://learnrkbin.jugalbandiresearch.com/ckfinder/userfiles/files/salelemubavutamo.pdfIn PDF document text
    • http://elementsgogreen.com/userfiles/file/80357336155.pdfIn PDF document text
    • http://asja-doll.ru/userfiles/file/86760835342.pdfIn PDF document text
    • http://www.hgbehringer.de/img/files/files/rajuriguzamedox.pdfIn PDF document text
    • http://tvoirostov.ru/ckfinder/userfiles/files/dubajarepinizad.pdfIn PDF document text
    • http://tw-go.org/files/32101468288.pdfIn PDF document text
    • http://meteosputnik.ru/userfiles/file/38481414526.pdfIn PDF document text
    • https://feng-shuiworld.com/userfiles/file/xujijawal.pdfIn PDF document text
    • http://myconnect-thailand.com/image/upload/File/10580359244.pdfIn PDF document text
    • http://prunay-en-yvelines.fr/ckfinder/userfiles/files/63901337113.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f402cfba4e2---67025602163.pdfIn PDF document text
    • http://www.zywawiara.pl/pliki/kavaxunez.pdfIn PDF document text
    • http://cfacgroup.com/uploads/FCK_files/file/88525826287.pdfIn PDF document text
    • http://bkdesign.ee/userfiles/file/72736280074.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/74503572034.pdfIn PDF document text
    • https://vleek.com/uploads/files/51411564977.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d11b766481---timivipu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=rent+seeking+and+the+making+of+an+unequal+society+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_off0000d3fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3FE 18048 bytes
SHA-256: 5bd572c888f6ca215574e01692707fe1e42e2a23c222e0f71d05262016da392f
font_01_sfnt_off000102b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B8 11464 bytes
SHA-256: cbd420a9dc81cb6cf435a1a64b8f766bc3b1a47cfd515fb25b0777c21cfd30ae
font_02_sfnt_off00011d31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D31 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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