Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd6c70c37a0adc5b…

MALICIOUS

PDF

87.3 KB Created: 2021-08-11 08:00:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: 118e1a230f7f40c36d26c6fcf855a8ce SHA-1: 1711efc3c9574cfcc0df143f5e11d23833978094 SHA-256: dd6c70c37a0adc5b60b530557e61cb3f3e9763c8a09486112bfc87ab9ff7cc5e
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised websites, many of which host further PDF files. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The presence of external URIs and a link farm suggests an attempt to redirect the user to a malicious payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 8

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xanbiente.de/userfiles/file/fanidujafulazizotifada.pdf In PDF document text
    • http://firanywiktoria.pl/uploads/editor/file/dapevuga.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/76be84439ac37f31ff03bdd97e1f6f28/xuzisuxuveji.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd637bf212---bajosesuvaruvuxafobo.pdfIn PDF document text
    • http://ngocvietbungalow.com/upload/files/94488632154.pdfIn PDF document text
    • https://kfz-gutachter-oliver-schiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160947c68ce43c---22198513420.pdfIn PDF document text
    • https://bataretak.com/img/files/file/94269232464.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/1610e597821cef---wowetelegomib.pdfPDF link annotation
    • http://indigobaby.eu/upload/files/rizafif.pdfIn PDF document text
    • http://re-view.online/fckFiles/file/95872772511.pdfIn PDF document text
    • https://bcm.es/files/galeria/files/31695606126.pdfIn PDF document text
    • https://hyosungulf.com/uploads/file/6924876874.pdfIn PDF document text
    • http://dcbestwings.com/uploads/files/funerusenovomudow.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606efcb67ea58---87734083310.pdfIn PDF document text
    • http://adirondackseafood.com/ckfinder/userfiles/files/vufino.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a07a841161f---jisedoletagagubuled.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160b0dae7be365---ridexokeg.pdfIn PDF document text
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/80440b24fa5e268f934b56c2e5e4fe66/77832440349.pdfIn PDF document text
    • http://moreit.ch/productinfo/file/ripibapif.pdfIn PDF document text
    • https://weboonline.com/ckfinder/userfiles/files/61898231499.pdfIn PDF document text
    • http://www.ecvbrass.ch/user/web/file/64491001411.pdfIn PDF document text
    • https://www.pension-chevaux-haras-gabereau.fr/ckfinder/userfiles/files/13259819820.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=teri+akhiyon+ka+kajal+dj+song+download+mp3PDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d264.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD264 11296 bytes
SHA-256: 74cbae85c70a094f11cd53178e7f8a62f68fee6fd1589341dcf85b3449e7c5c2
font_01_sfnt_off0000ec88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC88 16140 bytes
SHA-256: 00b1f632e8afe72716c8bcdb76b7901b56c060d1dc0f96f3f5c1b8373b85735b
font_02_sfnt_off00010204.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10204 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00011a16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A16 19000 bytes
SHA-256: d554215410378a974e251bbb742230f189d1fd63a5a9794ed8eb56cc14a55ead

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