Malicious PDF — malware analysis report

Static analysis result for SHA-256 f70ec2056e2df848…

MALICIOUS

PDF

78.1 KB Created: 2021-09-17 18:01:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: f25c5051b24b40c48eaac4d8a0c56479 SHA-1: 58dcbbb0289385c0fcc36d732a81f012777c3bd2 SHA-256: f70ec2056e2df8488f479c3db144b356f5cf1379a39af225e692491924266793
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many pointing to PDF files hosted on various domains, suggesting a link farm designed to redirect users. The presence of a QR code lure further indicates an attempt to trick users into visiting malicious sites or downloading further payloads. The document's structure and embedded links align with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://le-lemniscus-incandescent.fr/ckeditor/upload/files/zevufepefojumukoxona.pdf In PDF document text
    • http://rayocazar.com/images/elfinder-1.1/files/file/negogixivawupu.pdfIn PDF document text
    • http://iowatriallawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jiwipedaxode.pdfIn PDF document text
    • http://prodottoitalia.eu/userfiles/files/raweza.pdfIn PDF document text
    • http://gdlianyu.com/uploadfiles/file/86769721782.pdfIn PDF document text
    • http://re-media.ru/foto/ck/files/37692502932.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161332a7e5c7d9---morerizaguriji.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/1614432a8659f2---deromadepejudazibobelovu.pdfIn PDF document text
    • https://www.supremecaravans.com.au/application/third_party/ckfinder/userfiles/files/18302378709.pdfIn PDF document text
    • http://goldcoil.com/uploadfiles/files/77735083853.pdfIn PDF document text
    • http://thegioichuyendong.info/app/webroot/upload/files/18637532110.pdfIn PDF document text
    • http://cermak-expo.cz/data/files/file/85144728190.pdfIn PDF document text
    • http://kingbikeonline.com/images/upload/File/28469822300.pdfIn PDF document text
    • https://atputasbazes.lv/images/userfiles/files/96872874358.pdfIn PDF document text
    • https://magatek.com/documents/file/mogepuxuva.pdfIn PDF document text
    • http://dzstock.com/Upfiles/file/93849203614.pdfIn PDF document text
    • http://baobianhkhang.com/upload/files/32562426488.pdfIn PDF document text
    • https://otterdisplay.com/userfiles/file/lojexivawaxibonazemoxeve.pdfIn PDF document text
    • https://pointvirgule.ca/upload/editor/file/75608049782.pdfIn PDF document text
    • https://alternativi.brtim.com/uploads/wysiwyg/files/59054700390.pdfIn PDF document text
    • http://world-green-hope.com/uploads/files/tekonomerok.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=messenger+app+download+apk+old+versionPDF 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_off0000cdd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDD3 17400 bytes
SHA-256: a40a9043346d880380dc8c2071ef59a6f794cbf659e599ef04ff3b3e2332649b
font_01_sfnt_off0000fac3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAC3 10704 bytes
SHA-256: c5dad1867a7427d3a60915241a38435b49a80f1e939c758aa4d2b8397cead64a
font_02_sfnt_off0001133e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1133E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1