Malicious PDF — malware analysis report

Static analysis result for SHA-256 660b709f0afdd42b…

MALICIOUS

PDF

69.5 KB Created: 2021-09-01 16:31:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c4288763edbfe757dd10b4b8431b49ed SHA-1: c8025e44064d091f7265b106c0bedea9ae32ace3 SHA-256: 660b709f0afdd42bceefb295a6007d169a27d44a8e35ead031c2b419ceb5aec9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It functions as a link farm, with numerous embedded URLs pointing to compromised websites and disposable hosting. These links likely serve to distribute further malicious content or lead users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://zekidilektekstil.com/images_upload/files/vugenobeninatififitami.pdf In PDF document text
    • http://modelseafarm.com/kweb/ckfinder/userfiles/files/femufufebanos.pdfIn PDF document text
    • https://bistakalikotenetwork.com/userfiles/file/45370994033.pdfIn PDF document text
    • http://www.farmaciapenil.es/userfiles/files/xobibepunetibax.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/cd7c754aeb8683591ee2383503a01958/76440348269.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8f3ff79d93---kasozurozugajupej.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d65bab51d3---tikowusewigepedekif.pdfIn PDF document text
    • http://tugrabilgisayar.net/resimler/files/dirisusalar.pdfIn PDF document text
    • https://stiff.pl/ckfinder/userfiles/files/67345415237.pdfIn PDF document text
    • http://hubbardfamilycircle.com/clients/62940/File/16726649199.pdfIn PDF document text
    • http://hgbs.de/userfiles/file/33452183635.pdfIn PDF document text
    • http://superfasttv.com/uploads/files/majaribobafefopapabenowis.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/1aeee92d28100722816b278572d34a56/paxofase.pdfIn PDF document text
    • http://lnianemarzenie.pl/userfiles/file/32933255280.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/5ad64baa021cc1e110bcf987e526e9f8/silidak.pdfIn PDF document text
    • http://gayaarchi.com/userfiles/file/20210706061449.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/80162360603.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec435b7511e---libisupuwaverewerizixaxu.pdfIn PDF document text
    • http://qdjshg.com/files/file/76548918840.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/160760cb631eec---72316604349.pdfIn PDF document text
    • http://www.cenlajobinator.com/siteuploads/editorimg/file/96785774799.pdfIn PDF document text
    • https://lidiyageorgieva.com/ckfinder/userfiles/files/purawadujadupuzarusekut.pdfIn PDF document text
    • https://www.lipca.com/ckfinder/userfiles/files/38476702183.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=city+of+fiumePDF 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_off0000b4c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4C2 10040 bytes
SHA-256: 9d07bd7c52453473844d062ddf4db47caa1d6c6cc6cc15b8bde89f11e7acd375
font_01_sfnt_off0000cb2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB2D 14856 bytes
SHA-256: a5d8f3e1b1b587396621e960467c520f03212ec6ca752322a343039c55e39928
font_02_sfnt_off0000f0ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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