Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2fcc6118ecf2716…

MALICIOUS

PDF

67.8 KB Created: 2021-09-29 10:02:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 60835e3df880e60221651bf2db433152 SHA-1: d5ef9420079bccd955b22126450fa3213f5e15c4 SHA-256: d2fcc6118ecf2716996e0c34e89ae359f368f9f002b771a7768ae5ea36124cf5
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicative of a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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 https://huntic.ru/uplcv?utm_term=ios+cast+to+firestick PDF link annotation
    • http://screen.by/images/file/3485145692.pdfIn PDF document text
    • http://chocoenglish.com/_UploadFile/Images/file/2016220303.pdfIn PDF document text
    • http://agapetown.net/ckfinder/userfiles/files/zerorefel.pdfIn PDF document text
    • http://bluebossa.pl/files/file/zelidi.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/vdu0s41sg1lmon6r3kndjete4a/12805639515.pdfIn PDF document text
    • https://valserve.in/web/k/main_admin/ckfinder/userfiles/files/pizovipetudon.pdfIn PDF document text
    • https://greenlakepaint.com/ckfinder/userfiles/files/52946805652.pdfIn PDF document text
    • http://mwbright.com/upload_fck/file/2021-9-7/20210907235914816074.pdfIn PDF document text
    • http://eurogeographyjournal.eu/admin/fckfiles/file/derunakolepavilevuj.pdfIn PDF document text
    • http://luxcottage.ru/stroykamen/userfiles/files/17491007640.pdfIn PDF document text
    • http://rockhousemethod.com/ckfinder/userfiles/files/jijiguputukovigi.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614951d1945c8---17902118904.pdfIn PDF document text
    • http://safiorida.dk/operatori/userfiles/file/1880189763.pdfIn PDF document text
    • http://bluecars.pl/userfiles/file/89080447688.pdfIn PDF document text
    • https://www.antoniopopolizio.it/ckfinder/userfiles/files/givuwefe.pdfIn PDF document text
    • http://tmkb.org.tr/ckfinder/userfiles/files/29112837312.pdfIn PDF document text
    • http://ytovietnam.net/ckfinder/userfiles/files/49823726368.pdfIn PDF document text
    • https://zivotzaokny.eu/res/file/73262609393.pdfIn PDF document text
    • http://apcmagon.com/userfiles/voxuriwafikomoma.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613aa9219da24---951620385.pdfIn PDF document text
    • http://lianbang123.com/uploads/files/202109120625372341.pdfIn PDF document text
    • https://atavio.ru/files/file/jazagugifozenezosazi.pdfIn PDF document text
    • https://emailing-online.fr/uploads/userfiles/file/28988014555.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e4aea9dfed---12761647632.pdfIn PDF document text
    • 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_off0000ae50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE50 14428 bytes
SHA-256: 056f5ae3af447d575ec70bb5dbd9f05bf52121b43642795928cbfd5604ee351d
font_01_sfnt_off0000d26e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD26E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ea85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA85 10220 bytes
SHA-256: dd0175e9a2f8e35f9d0b86854f018b8bcbe5ac84e749248aa58ffa15d812d18e