Malicious PDF — malware analysis report

Static analysis result for SHA-256 69cf984ec51775e4…

MALICIOUS

PDF

102.9 KB Created: 2021-07-28 03:45:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 4d6ea17f64c6e4e9731c6e351c43ba03 SHA-1: 06f91f077c497991bed10c8fa58d244b97ab26f2 SHA-256: 69cf984ec51775e4110f84748889ceacb545d150eb8c3f7739bb6a7ff86881f4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites and disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection as 'Pdf.Phishing.Trojan' and the ML classifier's high confidence score further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and URL distribution are consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://bright-mineral.com/uploadfile/file/2021072807193447.pdf In PDF document text
    • https://riondene.ch/img/uploads/file/36612033079.pdfIn PDF document text
    • http://tgtech-auto.com/userfiles/file/38978919369.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/l3jt6iscn7r30v8q2mudr90f3o/tawoxomibuluxisolimedese.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094787f19dfb---24879170215.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/49653772725.pdfIn PDF document text
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608664d31e27c---95280793136.pdfIn PDF document text
    • https://bistakalikotenetwork.com/userfiles/file/22189326246.pdfIn PDF document text
    • http://dongkoo.com/uploads/editor/files/zapilezibuguka.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/160808ba8d6099---25977460348.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/f1599400d4e8dbcf4035a05ac4dc2d4a/jifewegezolesojutuzuvas.pdfIn PDF document text
    • https://guineaservicesproviders.com/gsp/files/negoluxepa.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/819db45a15a205bf92bb0436b8ab6314/96418612100.pdfIn PDF document text
    • http://firstcuwire.com/file_media/file_image/file/vipunobupodibif.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/4a24802b2fe4b39b0f40d25060d9efe2/vegakemuwusozijovododal.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609730c931110---35732964329.pdfIn PDF document text
    • https://medicentrumnz.eu/medicentrum/files/file/nusifof.pdfIn PDF document text
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089d2b27f564---roruzarikutetoxok.pdfIn PDF document text
    • http://webcertain.net/contentupload/fckeditorUploads/organization_/file/vewiwixexipakusakegaf.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c183b27cdf---54500902935.pdfIn PDF document text
    • https://visionbrindes.com/admin/fckeditor/userfiles/file/wukowamisupotinonotajove.pdfIn PDF document text
    • https://doanhnghiepvietnam.org/img_duhoc/files/bosasuzevitu.pdfIn PDF document text
    • http://ms-beauty.com/ckfinder/userfiles/files/jenogepewa.pdfIn PDF document text
    • https://serka.com/serka/upload/files/fasexadaparobup.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=cuantos+huesos+tiene+el+ser+humano+para+ni%C3%B1osPDF 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_off000129d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129D1 18744 bytes
SHA-256: 152769a5341d1c043ee53d9e4c1e64d3143b1427f6d57c52ce836ec4af3a9249
font_01_sfnt_off000159d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000171ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x171EE 10852 bytes
SHA-256: 61287068cc4d4927f7f01b04cb1d7a8805ca7427df55732dbd5602f9ecb38eb8