Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd0ce1bdfa5023ee…

MALICIOUS

PDF

82.1 KB Created: 2021-09-20 02:58:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a3e9ee3b0ba4b39b07bb4d7e06f9169e SHA-1: 65e29584d3c9d3ed4fd1137455bb3ae9cefe4df1 SHA-256: dd0ce1bdfa5023ee29e251066b87401e98f7e0f88382e4583079b078b9cedc0c
164 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 7

  • 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.
  • 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://huntic.ru/uplcv?utm_term=download+cheat+zombie+catcher PDF link annotation
    • http://top-rubber.com/admin/fckeditor/editor/filemanager/connectors/upload/file/bamolukug.pdfIn PDF document text
    • https://kaptenhoki.org/contents/files/pabexafim.pdfIn PDF document text
    • http://jca-t.com/fck_image/file/98013154616.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/161449df3259a6---rawivoj.pdfIn PDF document text
    • https://jbdclothiers.net/emailer/userfiles/file/81615548945.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16131f185442cb---lalawixuzuxoverawexibo.pdfIn PDF document text
    • https://www.alongsideasia.com/wp-content/plugins/super-forms/uploads/php/files/d1e770d312765095d5e2719ca7e57868/60404721840.pdfIn PDF document text
    • http://brenno-tojestto.pl/userfiles/file/66183966691.pdfIn PDF document text
    • https://watfordfairtrade.org/app/webroot/img/files/93690558333.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1614001098a13e---36237274982.pdfIn PDF document text
    • https://totalsewa.com/userfiles/file/92425169669.pdfIn PDF document text
    • http://truhlarstvi-strakonice.cz/files/file/77970687862.pdfIn PDF document text
    • http://td-mg.ru/uploads/files/beduredivojavoduzixunet.pdfIn PDF document text
    • https://bnbtravels.com/ckfinder/userfiles/files/15924323141.pdfIn PDF document text
    • https://stcc-sa.com/motakamel/Ups/files/55450028866.pdfIn PDF document text
    • http://www.asap-recruitment.net/upload/file/10335253665.pdfIn PDF document text
    • http://yejiya.com/userfiles/file/65623640578.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613ec9ad2476b---65815363016.pdfIn PDF document text
    • https://traveletrust.com/basefile/traveletrustcom/files/29671932949.pdfIn PDF document text
    • http://mondoacquapiscine.com/userfiles/files/podopolegu.pdfIn PDF document text
    • http://farmaciacogliate.it/userfiles/files/47421832780.pdfIn PDF document text
    • https://eagleegg5k.com/ckfinder/triplebuserfiles/file/gofenofirivupuduzujepuni.pdfIn PDF document text
    • http://sbsedupatti.com/sbsedupatti/userfiles/file/juredemotupaxan.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/161391f390803c---daxojojelemumu.pdfIn PDF document text
    • http://capitaloffice.pl/fotki/file/boxatiwokepijolunopuradol.pdfIn PDF document text
    • http://mrpennarak.com/user_file/file/30410833061.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_off0000db62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB62 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f379.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF379 10756 bytes
SHA-256: ba41846a90e8d63e33ed6fe9e1ff428b4b5010c775a1a3fd2f0eb30d74056541
font_02_sfnt_off00010c08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C08 17692 bytes
SHA-256: 8664de9f9fe0c91c776ccaf47808353f2bf9ef4a17f3e04c158e76abf8e9b499

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