Malicious PDF — malware analysis report

Static analysis result for SHA-256 db8cf45b099f7935…

MALICIOUS

PDF

96.7 KB Created: 2021-06-27 08:18:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 8283e575843b8e02cb8e63bed6e66766 SHA-1: 4641bed66534973a04f80052113ec95aa39a9fbf SHA-256: db8cf45b099f7935fa24c8d12778d926daaa745a8bdaae8c78b5278280f9ffde
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised WordPress upload directories. The ML classifier and ClamAV both strongly indicate maliciousness, consistent with a phishing or malware distribution scheme. The document body is unreadable, but the heuristic findings clearly point to a link farm designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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://et-auditing.com/userfiles/files/ridadabilikitedajivafod.pdf In PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1f39d719b7---xewumuxawaxenevotugumek.pdfIn PDF document text
    • https://ascinfratech.com/clientprojects/trading/file/94957911769.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/680ce66fe50e864173fd03c269c9a983/lopigotokitimivaxugo.pdfIn PDF document text
    • https://getlovebooks.com/wp-content/plugins/super-forms/uploads/php/files/ad046d94916c3f179799736f9d98f9fe/27801894854.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607813a4e91b4---95729073023.pdfIn PDF document text
    • https://betentour.com/sites/default/files/file/tezubavivazonejika.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083a6ffea982---38176345554.pdfIn PDF document text
    • http://www.aadhar-interior.com/userfiles/file/7689963814.pdfIn PDF document text
    • http://webinaris.biz/ckfinder/userfiles/publics/files/78718304532.pdfIn PDF document text
    • https://mytekas.com/UserFiles/file/17520247576.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/b6218e080a32d0ea95746d6d78636302/23916636368.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/o49nosikpbipc7hotis3bdsqv3/6752539521.pdfIn PDF document text
    • http://n-production.com/upload/fckeditor/file/54318506559.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/0ba661ccff88879a5d87824f6b37c0d3/xerinusijumibola.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160985bf389fd4---nesabuzudelamiku.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/vch0vepfd2m1ljiinn00ujejcc/71836053496.pdfIn PDF document text
    • http://discarga.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075a916ad619---64655251665.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/isdum1j13d52cgobd9advq4fqt/ruleniwililedege.pdfIn PDF document text
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160b2b34369203---jukafomijowasilogej.pdfIn PDF document text
    • http://insidethedigitaltrend.biz/userfiles/file/67627510058.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160beb7313fa44---19008134315.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/3cedd8d1995e90a8b0e090beecb9d44c/61661718948.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/5546ffddbd238f96615ee0e9e4368525/lodijurulededimuz.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/d508e0e192f9d6d0010aca139943a801/kizupilome.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=answers+to+ethical+interview+questionsPDF 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_off0001116e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1116E 19884 bytes
SHA-256: c238057c8e8ced3ffc851a62f0e6b07f7b2b3652a9b77216a2e645c03fbdb707
font_01_sfnt_off00014480.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14480 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015c97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C97 10708 bytes
SHA-256: c309786b150389e83089748f5cc90f45c4fa37ee541bedd0291ec147ec2f1a5e

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