Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b9b15dfb9b3b384…

MALICIOUS

PDF

113.8 KB Created: 2021-06-27 23:31:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: d50300bf3b2ec2d58992d7555f09f113 SHA-1: de42cb4fcbacbc3209c12d0749fc08101bceb309 SHA-256: 4b9b15dfb9b3b384cf4043e3a943184a458dd3cb633f55066df218726bbca110
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier clean score 0.0570

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/1609c20168ffa4---30794767078.pdf In PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/66d43ccff32a0e82c3292ac731c4f0de/4583771238.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608ba159a1d97---gaxizetonovunowikenag.pdfIn PDF document text
    • http://zulaikhatextile.com/userfiles/files/43248964218.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160842e043cb10---49497482921.pdfIn PDF document text
    • http://ngor2-3.com/file_media/file_image/file/80361410074.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a923d462d71---88826459691.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a07d4d8f2e4---tenow.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606c941234f57---rirudilojawolab.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/samojarukojukamepadenadij.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16091ba4bb6ee7---nogis.pdfIn PDF document text
    • http://bettaletroom.com/file_media/file_image/file/89008074543.pdfIn PDF document text
    • http://bracyfamilyreunion.com/clients/c/c2/c2db1a97f769835965582c74015c7782/File/zexemamelakibana.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4c4d5032b---varos.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb0d442b48---93298894943.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7985529f1---pebevasazakapegepiv.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/0a566c13fe356432d413d7b5bb25552c/57485782732.pdfIn PDF document text
    • http://joy05.com/_UploadFile/Images/file/baditazid.pdfIn PDF document text
    • https://bladmedyczny24.pl/wp-content/plugins/super-forms/uploads/php/files/b60a57c58bd59c0bac21da155d7cec6e/xesuvav.pdfIn PDF document text
    • http://mdc.ir/ckfinder/userfiles/files/dufebimalupilelavomir.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607dac3d4947b---58252997462.pdfIn PDF document text
    • https://fl-forever.com/upfiles/editor/files/zojaxi.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/e0eb51f66dfb074ef5fb11c62d499ed3/zexelogumefokuvatovifidaw.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160768f6eca59a---84819078376.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/1b9578ad83619c8cf0bbbc72b338ce83/65188397115.pdfIn PDF document text
    • https://weeb.nu/userfiles/file/lugafasitisoxazefowib.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=taxi+in+afrikaansPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00010a7c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10A7C 24924 bytes
SHA-256: e58642a1772bf7de0c44e7fc3f5472d4d715f792da7a59e2f6a9790693469c2c
font_01_sfnt_off000138b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138B8 9968 bytes
SHA-256: 4f41927789bcfa8fb38b320e6698f6a5822ff3bd0fd52555104b9b736b5311f0
font_02_sfnt_off00014ed9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14ED9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000166eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x166EB 30656 bytes
SHA-256: 6264e939854c31f4457b3780fcecad215addee72f6e554a8afb5d97c8ee0ae8d
font_04_sfnt_off0001ae39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AE39 7516 bytes
SHA-256: 5c221091eae0cbe526e6ba851eacd629783a43438d6456f1b44929041440c6e4

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