Malicious PDF — malware analysis report

Static analysis result for SHA-256 1786292dca06dc94…

MALICIOUS

PDF

83.4 KB Created: 2021-06-26 17:09:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f9ccd871bf0e661aa9e9ff5843e93e49 SHA-1: 859db55d215c94ea16510b8a2f30e6028e2be27e SHA-256: 1786292dca06dc9490faeea4cc6b4f14092995aaece3306d516a60d7f10383bf
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many of which point to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the detection by security tools indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160729d75162bc---16042002890.pdf
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/fa0b5f1d80fde407a9f17207a62488db/zaramudunepasukor.pdf
    • https://spheresignal.com/app/webroot/userfiles/files/5864243504.pdf
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/pk0gbrrlh5j0teaa3280d71gi3/wetegolefurop.pdf
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/aa2003ae42b1fc855a525e10cf81de2d/95922682451.pdf
    • http://architects-desk.com/uploadsfile/57491325076.pdf
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160d687bc09ca6---watese.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b59063009e8.pdf
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9835f7860a---24214295915.pdf
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160848002cc121---nezera.pdf
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/4i4a57qtse57ojf6j4momvce9v/59358902840.pdf
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/1cf9b681886e43189a315ab4cb0cb400/10185510758.pdf
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f92350d507---39921591512.pdf
    • http://maidnheaven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2a0790107---nakil.pdf
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/e024964f37ca39c64954be44010ef4c7/kexoretefuvipizagomororo.pdf
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0e47d8c66---denamukilutonibutaxa.pdf
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606c68c1762c3---xijopifabebizudumujalewux.pdf
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c69253175b1---76472125336.pdf
    • http://angelojrobles.com/admin_initial_test/userfiles/file/828990536.pdf
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b782c85d350---jikesobusane.pdf
    • https://paklya.su/design/img/upload/file/25231403798.pdf
    • https://alkirbilaw.com/userfiles/files/35412494269.pdf
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a324bb382c---20168010089.pdf
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/32f45bc73ff71857baa0b7d3b87f72e6/91035121559.pdf
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/sfg2lsqad892r2bg2be4ska56o/visejenojefewesavipijuz.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=four+pics+one+word+6+letters
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3c3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C3 16792 bytes
font_01_sfnt_off0000fbda.bin
fca543d39983866d1010e5cb50d2c8245379e618d4b151ac9443d17378928d72
pdf-font-stream PDF embedded font (sfnt) at offset 0xFBDA 10676 bytes
font_02_sfnt_off00011477.bin
b637df212a285c2c5ca4afa3658664abdafde5c8abc3a4bf1bc223f2eaad520f
pdf-font-stream PDF embedded font (sfnt) at offset 0x11477 16876 bytes