Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dd15e6f4b69aff4…

MALICIOUS

PDF

102.1 KB Created: 2021-07-06 15:53:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: bdcd6f3f85a32678e62e052a874b1359 SHA-1: acee2f0eda250fedce4df09ec34bd6d49b9c2be3 SHA-256: 5dd15e6f4b69aff42b6a75d5c92fe53605b0751be416a848ec42e1c6050f4cef
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains a link farm with numerous URLs, many pointing to compromised CMS uploads or disposable hosting, suggesting an attempt to distribute malicious content or manipulate search engine rankings. The presence of external URIs and link farm characteristics indicates a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9874

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://angkortaxiservice.com/userfiles/file/tavoz.pdf In PDF document text
    • https://betentour.com/sites/default/files/file/pozetipuxenujo.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/8fk8ftmun5n27i9s6qs024g8k4/vavukinogeburunizijerita.pdfIn PDF document text
    • http://csptech.net/admin/userfiles/file/70103673984.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6627629e02---varetitiram.pdfIn PDF document text
    • http://sitoad.com/bbqjoekey/files/202106081507058430.pdfIn PDF document text
    • http://patanamachine.com/imgUpload/files/feburusekoda.pdfIn PDF document text
    • http://smart-ventures.ch/upload/Editor_Images/files/43416721417.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/9f2b01658141fa51dd031cf7d088cd21/nozanivifef.pdfIn PDF document text
    • https://afra24.com/basefile/afra24/files/25181065674.pdfIn PDF document text
    • https://festival.bg/fckeditorfiles/file/53924397237.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160798393dc379---laxagobokemavazefikuv.pdfIn PDF document text
    • https://leavereview.com/customerinterview/ckfinder/userfiles/files/wufasabefasaxisobavenowoj.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/90b0c9b2bccf14b62b6d99544ed354dc/93477266877.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/37139660621.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088abf1c302a---42629162328.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/50e096b2b6295e2106cedd2b54066d3b/58067154902.pdfIn PDF document text
    • http://safetypath.net/cms_images/87595594867.pdfIn PDF document text
    • http://nuestratierrapremios.com/campannas/file/jagerogudelumewigiza.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/e0ae7dec2d539951489d07e3d9e24c21/92173672169.pdfIn PDF document text
    • https://rijst.nu/userfiles/file/33187714536.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/be9ee310765791ecc7d39808f14746ce/wugimexolesi.pdfIn PDF document text
    • http://studiotecnicomartani.eu/userfiles/files/fudose.pdfIn PDF document text
    • https://actor-conseil.com/files/file/9493434903.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=fill+in+the+blanks+for+competitive+exams+pdfPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001139d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1139D 17872 bytes
SHA-256: ee2e81042ff1e288f93f3e877a916db6d9de79913141bf28f2af045683edcb4f
font_01_sfnt_off000142a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142A1 11264 bytes
SHA-256: a17ebb88611491ff3971db0a5ec69f37f8f3d33fdae9b94c13fc0c50d587ee25
font_02_sfnt_off00015ca5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CA5 16144 bytes
SHA-256: fcca37035df06e555c2991ff65faa0e8497ca6423bee408ebc46b3aef925b516
font_03_sfnt_off00017224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17224 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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