Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cabfda253da89f3…

MALICIOUS

PDF

92.8 KB Created: 2021-07-27 20:54:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 463e16c98a36e968a1dc6ff6f24c99ed SHA-1: 3cfef6b1ff28d71663f2a4d974e2d4ddb19cb0c8 SHA-256: 2cabfda253da89f3a14cce8e12a4b8cfbb458b0c247101acc0e8b2e99470ea0f
156 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded URLs, many of which point to compromised WordPress sites and disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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://owtsreunion.com/clients/e/e7/e717deb27d844c69ffc49b2d3c0bb1a5/File/nagotus.pdf In PDF document text
    • https://ultralloy.net/upload/files/kexitoxaz.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/45cf3f5aeed24cb150d4a50fc099d887/9324614190.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/565365e1e8f38326d3fe3094e02375ac/63022628872.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/2c16309d0b6e7a30a11239c919b475dc/75361485771.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/1608983cd0f100---9745954920.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4b983ae30---97308645212.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-5-24/20210524185401119597.pdfIn PDF document text
    • https://autotrans911.com/thread/admin/uploads/file/48432311428.pdfIn PDF document text
    • https://webornate.com/viking1/uploads/files/51318944756.pdfIn PDF document text
    • http://cestovni-postylka.eu/userfiles/file/99221697739.pdfIn PDF document text
    • https://www.jemelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca9d456435---47818197336.pdfIn PDF document text
    • https://winston-woodward.com/wp-content/plugins/super-forms/uploads/php/files/7636d0ee74ea30f047660d4ec8d5995d/sitadorovofaxokofa.pdfIn PDF document text
    • http://bioterapiazabiegi.pl/obrazy/file/naboli.pdfIn PDF document text
    • http://hublihorse.com/uploads/userfiles/files/wanagix.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/dn0ftcn85q23bdomprbrhq2594/zepixukidariruludufiwufux.pdfIn PDF document text
    • http://4998horo.gmmwireless.com/contents/files/59817985768.pdfIn PDF document text
    • http://hillsdalehorseboarding.com/ckfinder/userfiles/files/72344575506.pdfIn PDF document text
    • http://zussobrance.sk/grafika/dokumenty/6271659220.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d466268d5a0---61203322518.pdfIn PDF document text
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/f509fb28b05e6877fbe506284ea0fc89/80092731327.pdfIn PDF document text
    • http://www.colormotion.cz/UserFiles/file/76942758615.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/2d6d35311310549dee46bc54b7ca9996/xevolagoxuzagepefuliwisux.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=melhor+dieta+para+perder+barriga+rapidoPDF 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_off0001037c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1037C 10532 bytes
SHA-256: df02e66e85538e8b1482ba33b177d6b949365d3e14628bea29be6c54471899fe
font_01_sfnt_off00011b1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B1D 19376 bytes
SHA-256: 2a42f08f196c7b217e906d3bc0091041a663c67590d6c374fc5470bdab7d3373
font_02_sfnt_off00014a8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A8B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1