Malicious PDF — malware analysis report

Static analysis result for SHA-256 01f3488134f2ff5c…

MALICIOUS

PDF

94.2 KB Created: 2021-08-03 07:44:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d1f95703e33773861e532588d68a0c11 SHA-1: 1996177ac3d8f4457358af7cccce554f3657a138 SHA-256: 01f3488134f2ff5cda5a4e7fd6ecae1af047b25936fac6c0c1f75ad4d52caf63
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress upload directories, indicating a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent. The presence of multiple distinct hosts and the use of UTM parameters in some URLs further support the classification as a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8107

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://chieusangducphat.com/uploads/userfiles/file/vorafe.pdf In PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f2e1918481d---zawuwobe.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/c51b8e9b4c2be4d3cfb60db37e5b374e/tonizekikigasitower.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ca350d08da---36778449944.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a653f2d8df0---bagakazonax.pdfIn PDF document text
    • http://lorichphoto.com/pictures/file/bivik.pdfIn PDF document text
    • https://catbasailing.com/upload/fck/file/rariluzeresimapuvax.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/61899328776.pdfIn PDF document text
    • http://komputerzagrosze.pl/userfiles/file/73068783630.pdfIn PDF document text
    • https://genesislighting.net/wp-content/plugins/super-forms/uploads/php/files/795ff8de8bbf5d07c53c0ebaf482b302/mubeponuwodop.pdfIn PDF document text
    • http://csc-021.com/userfiles/file/20210612182536_25zood.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/f125d2894649138c58497d6f68259304/9751815614.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/bbcfcc43a7697d7d4c3adf547a1c835b/nogusetuve.pdfIn PDF document text
    • http://kowalstwwo.pl/public/cms//images/file/lugebukufusugat.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/83821400855.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/f03754c4389670dbed324e55782dab8f/wutexuzedurizegu.pdfIn PDF document text
    • http://apexibd.com/uploads/fck_uploads/file/musivobafatulobirovawi.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/3a700a2d83908db85681709839c081e8/tufoguledax.pdfIn PDF document text
    • http://rolmech-strzelno.pl/Upload/file/84241233411.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/9erdbef4vsk4rlku3t8uqh8l8s/dimoguti.pdfIn PDF document text
    • http://www.ecostroyservis.ru/File/vawavitenigudipifilowu.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609952f58359f---nagerujuxozusipudejik.pdfIn PDF document text
    • https://fullhousetourism.com/UploadFiles/file/20210617011310189.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eaa1b8cf9f---soroto.pdfIn PDF document text
    • http://www.fullertherapy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bff64e04910---tevixosaxabilivexomufixe.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/17eba6d5d7929e33294236e731524045/rizizotipitemufelajev.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=lg+24+inch+led+tv+panel+price+in+indiaPDF link annotation
    • 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_off00011752.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11752 17040 bytes
SHA-256: 7fbb7fb9e70ac0602cc6c13be33c7eaa754c77c5960694fb35eea6076922b272
font_01_sfnt_off00014389.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14389 10728 bytes
SHA-256: c339ac57a4bc2af40659a324757bc40ff6a17a31ac487d796428b5bc1cadbf15
font_02_sfnt_off00015bf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15BF9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1