Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebff0351d5bd192a…

MALICIOUS

PDF

94.0 KB Created: 2021-08-03 20:23:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 9eedae28b4111378901ad85a82432bb8 SHA-1: d8a70eae2b1cf8cd35826138bede8b7683f39789 SHA-256: ebff0351d5bd192a665fb0fb1198a9221e9e2b35d12af7e709f652c5cb6ef66b
176 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of raw IP addresses in URIs further increases suspicion.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://archism.ru/uplcv?utm_term=avatar+the+last+airbender+the+burning+earth+xbox+360+achievements PDF link annotation
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160e4b3294d39e---dulonojepazobexegi.pdfPDF link annotation
    • http://pusheng168.com/uploadfiles/20210713191254.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/1132e1c290f03daf33ac8a60495078a0/fimilifemusozi.pdfIn PDF document text
    • http://florylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/18429578336.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160860ed0399c4---zadudad.pdfIn PDF document text
    • http://atlonnuri.org/UpLoadImage/editer/files/gegipazoruf.pdfIn PDF document text
    • http://goksirkrupskimlyn.pl/img/upload/files/renijuxafipumukiwupovibaj.pdfIn PDF document text
    • http://alacarte-grafik.de/userfiles/file/59930880024.pdfIn PDF document text
    • http://maryalo.com/userData/board/file/teniwevolupun.pdfIn PDF document text
    • http://cansuyu.org/resimler/files/8688507557.pdfIn PDF document text
    • http://ahdongjiu.com/upload_fck/file/2021-5-17/20210517175746544041.pdfIn PDF document text
    • http://thetownsendfamily.net/clients/a/ab/ab79602242cca8f930cd52af13df1d51/File/nekanagogagaregudi.pdfIn PDF document text
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/e3l15hfbanob1fia864torab76/90544653123.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16098ae6c47277---kunixusodejuretopusuluben.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160829e757ec25---52069252755.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/fea92de8b76a95c7d299217607c0ac67/55074254357.pdfIn PDF document text
    • http://legalinet.eu/userfiles/files/21400348387.pdfIn PDF document text
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/634212270c6c05e5c99b87f06632f258/10040448868.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/95c24c1582631b30e8e999db1a17fece/watemu.pdfIn PDF document text
    • http://primavera-bio.cz/userfiles/file/50974298749.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160811874579bb---69865108426.pdfIn PDF document text
    • http://microcement.ua/userfiles/file/88497769820.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000107d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107D8 11668 bytes
SHA-256: bbedbad5da7b786df2c0e75a3ed8ca01062b4afc4798299564c237b073c081fb
font_01_sfnt_off0001234d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1234D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013b5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B5F 17652 bytes
SHA-256: f1472def189c799e1337fc17a632561e07330c22c09dc92705bd24c021b62d34

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