Malicious PDF — malware analysis report

Static analysis result for SHA-256 11bfd9aafb9d91ab…

MALICIOUS

PDF

76.2 KB Created: 2021-09-01 11:30:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 19f66aed0d00324bc3adbc66d85e749e SHA-1: a4493139f743352639a771c38780b176c83e043c SHA-256: 11bfd9aafb9d91aba71f5cfe4272fe39c88525a54b4273190ec7d1e13b9686d2
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites and disposable hosting, indicating a link farm or phishing lure. ClamAV and ML classifiers strongly indicate maliciousness, with a high probability of it being a phishing or malware distribution document. The file's structure and embedded URLs suggest it is intended to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16075a15612de0---24561752355.pdf In PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/pi8pusmgkbtg0cfnjp09vjfr91/nibuji.pdfIn PDF document text
    • http://vssteel1999.com/ckeditor/userfiles/files/46243759745.pdfIn PDF document text
    • http://apothepharma.com/upload/files/39258950252.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/cb7d8cca1ee760cd6660b0cb108f83b5/82701457404.pdfIn PDF document text
    • https://manualismedicina.hu/fileok/file/34662242420.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/0e08bd18ec3f3e3b12990c9858cb48c5/93277945373.pdfIn PDF document text
    • https://bestofbucerias.com/upload/file/62670591669.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079cfa137a2b---68447944562.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/8eecca9bbea73e75ebc138a7dafa91ba/sexulalejigakokadaf.pdfIn PDF document text
    • http://roletyhanarol.pl/files/file/52709689608.pdfIn PDF document text
    • http://muskogeeroughers1967.com/clients/9/98/9899c641331876fb313f08ec475a0443/File/sikofameduwinonurazifala.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c53fba51b21---keriwowananinoxutagus.pdfIn PDF document text
    • http://cnpair.com/userfiles/file/53962635658.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/zemopepa.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/zigusujijupogijotoxuja.pdfIn PDF document text
    • http://hong-tour.com/FileData/ckfinder/files/20210802_010390DF5F02BC35.pdfIn PDF document text
    • http://restaurant-lyons.fr/userfiles/file/39896529296.pdfIn PDF document text
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/b7fa82c618405226b81a8ba52ace5a92/sobuwoxufoxot.pdfIn PDF document text
    • http://waypl.pl/upload/File/bifinalivodesoz.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/305d9125a3685ec31971f8430ac29448/4134852181.pdfIn PDF document text
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/4f7b2ecf9ff178c00580901335bf45c9/26088512178.pdfIn PDF document text
    • http://sameiroeventos.pt/ficheiros/91322850258.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607be0fbaf114---13421282257.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/161134a5be180f---titilotozizajajivodana.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=free+short+stories+for+3rd+gradersPDF 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_off0000c64f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC64F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000de66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE66 10632 bytes
SHA-256: 80cf8a561bd82710e3c4a63ded547963374c8b65d0deabdb393b69ec306a21ef
font_02_sfnt_off0000f6a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A6 17072 bytes
SHA-256: 9c3bb46b0015a5619c094252bab52c42ed0782564c76e899b614366e09f05db6

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