Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9467a9c09a69237…

MALICIOUS

PDF

80.9 KB Created: 2021-09-21 06:45:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 917aafeea27c14dcef398f6cd8d94dd3 SHA-1: 3d92edf293b651d7648d69a9ddcceeba7c6664d6 SHA-256: d9467a9c09a692371bbd7f0e44d56011b0fc0bf0a618af33e233908378b4fdac
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan variant. It contains numerous external links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm or redirection scheme. While no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of an attempt to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://giga.sk/storage/file/26730003444.pdf In PDF document text
    • http://adidravidar.com/ckfinder/userfiles/files/7328462083.pdfIn PDF document text
    • https://tspinstruments.com/cache/fck_files/file/xasonodazipovu.pdfIn PDF document text
    • https://beyondpins.com/calisma2/files/uploads/43433250316.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612f6c4930047---dikovo.pdfIn PDF document text
    • https://songhong.info/userfiles/file/tefoxawulelixe.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f8d4867e5c---92594309237.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/moxatomu.pdfIn PDF document text
    • http://mastrodibaglio.it/userfiles/files/64168505092.pdfIn PDF document text
    • http://vetusmeter.com/images/upload/File/43900422299.pdfIn PDF document text
    • https://braveathlete.net/geektic/files/ratasagepofuxa.pdfIn PDF document text
    • http://american-security-inc.com/assets/ckfinder/userfiles/files/vudug.pdfIn PDF document text
    • http://kameleonhastanc.hu/files/file/sugefowod.pdfIn PDF document text
    • https://gjbuyerbroker.com/userfiles/file/53205461871.pdfIn PDF document text
    • https://ivfnna.gr/wp-content/plugins/super-forms/uploads/php/files/f2be9fcf9306edc9c5fd57a4d3b5c152/53017960656.pdfIn PDF document text
    • http://logisticsnetworks.net/ckfinder/userfiles/files/wapub.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/fe1d4718b3fbbe4e9963d1bbb61f76ab/77587069622.pdfIn PDF document text
    • http://cachnhietwin.com/luutru/files/3714164771.pdfIn PDF document text
    • http://veszpremlizards.hu/_user/file/tenosugavojugekefiwog.pdfIn PDF document text
    • https://pierrelemagicien.com/userfiles/file/vegavu.pdfIn PDF document text
    • http://iraneto.com/basefile/iranetocom/files/25948633934.pdfIn PDF document text
    • http://avtokapriz42.ru/userfiles/file/lagekogegataseduwubi.pdfIn PDF document text
    • http://disonde.com/filespath/files/20210901063430.pdfIn PDF document text
    • http://shengyaweb.com/uploadfile/file/2021090713424610.pdfIn PDF document text
    • http://ohadalegistrocbarter.com/ckeditor/uploads/files/fizavojidupulanixaduteno.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=logo+quiz+app+answers+level+3PDF 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_off0000d68e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD68E 17932 bytes
SHA-256: c7df787a2c419da3a77a60326aaa9fd31f338c64957342f9483ec983c82a691b
font_01_sfnt_off000104a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104A7 10916 bytes
SHA-256: 015d4dd9ba69e8b7e23fa6cd04cb141df75e18a24da97f7b01111fa4f0158142
font_02_sfnt_off00011dd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DD8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.