Malicious PDF — malware analysis report

Static analysis result for SHA-256 37dd787010bcf604…

MALICIOUS

PDF

83.3 KB Created: 2021-09-02 23:48:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5dfb9ded022188c4d4e3d51569c25b60 SHA-1: 3f8750b75627e6b68b9887d3e8aa7ac3fe3d4ce9 SHA-256: 37dd787010bcf6040a13930d8b5ea52b2864c5da2c48614e353a93abcb7bf81f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains a link farm pointing to multiple unknown URLs, some hosted on what appear to be compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics strongly suggest this document is designed to lure users to external sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c687754fa83---95800378381.pdf In PDF document text
    • https://rdsdealers.com/ckfinder/userfiles/files/53517522889.pdfIn PDF document text
    • http://sushikyototogo.com/uploads/files/85465230812.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/4cd140a84437adb8d75f0187872fc31f/57998404385.pdfIn PDF document text
    • http://hiro-seiko.com/upload/files/sebukabopawizofejimoses.pdfIn PDF document text
    • http://akgwealthplanner.com/crm/files/40030237415.pdfIn PDF document text
    • http://dztechfin.com/upload/file///wufiridesurevuxuforemeb.pdfIn PDF document text
    • http://hankyunget.net/userData/board/file/tamovizuj.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/9aa7f86e8322d4658d5525e8d622d662/malabivomuwexasab.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160e26a12a1f8c---nopobosuviduwa.pdfIn PDF document text
    • http://tokyoracing.hu/userfiles/file/xobekazusofebul.pdfIn PDF document text
    • http://auto4-spb.ru/public/images/ckfinder/files/ligetawazopigokowax.pdfIn PDF document text
    • http://polskienarty.pl/data/aktualnosci_imgs/file/9625221222.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c4f5d129e6a---77082148220.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16079f8c1249ad---18015400422.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/68836842gc4uotnvfib5lsaack/82865456828.pdfIn PDF document text
    • https://ascinfratech.com/clientprojects/trading/file/dolujavoro.pdfIn PDF document text
    • https://sanagustin.cl/files/jemaxekoliseviwegaside.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=dedal+i+ikar+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_off0000d87f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD87F 22384 bytes
SHA-256: 98eb6715900d5b64050595ea3c808ae3aa109d88096b479e57b78815267a69ad
font_01_sfnt_off00011145.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11145 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001295c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1295C 10096 bytes
SHA-256: 2e71b3f55f8e5dce3963edbefd1a7b8f68270bf524679065faa2b09bac90cc99