Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfec2fa856164ac9…

MALICIOUS

PDF

79.6 KB Created: 2021-09-01 12:11:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 22ca4f518706a09d2553f5672d4db1c6 SHA-1: 50e4eff246a627e94554775c8dd840e118291530 SHA-256: bfec2fa856164ac9d8e2daa9d32ce614895d489bb1813a91bc1562536aa0195d
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The primary purpose seems to be redirecting users to potentially harmful content, aligning with a phishing or malware distribution strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://bet-balance.com/userfiles/file/54317961332.pdf In PDF document text
    • https://people11people.com/uploads/File/66490067202.pdfIn PDF document text
    • http://thegibbsfamilyreunion.com/clients/d/d9/d929505c7faf6263097cc97620c39d65/File/57225775977.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/7ce6a3734b9a21f70e0588bcfe22e5a0/19820340179.pdfIn PDF document text
    • http://carlaschroyen.com/content_docs/bavitomopapitalaxumo.pdfIn PDF document text
    • http://computerdoki.hu/user/file/sikagoguledusosafijoniw.pdfIn PDF document text
    • http://lacasedescaraibes.fr/file/zevanum.pdfIn PDF document text
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/34bdf83ca1c8d7a4c12b4b8fbfd8fbec/dapegojamov.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/16078ef0040943---vipofado.pdfIn PDF document text
    • http://alphanaturehk.com/userfiles/file/betumijafodefiwovoduxu.pdfIn PDF document text
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/b6382ff2a03450f81ea0383ccc3af1e2/feketulawazizemelapep.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/1457a725d6705be52861ac602eca7ae4/71519519206.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16082da652b286---83799080533.pdfIn PDF document text
    • https://rosebankprimary.co.za/inc/ckfinder/userfiles/files/viganurefose.pdfIn PDF document text
    • https://editionsitaliques.com/userfiles/file/xekikedasopak.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/b812828a08f86f42ac914b5a3cb3a32d/punevimigiki.pdfIn PDF document text
    • http://goldmustang.ru/files/files/68589429407.pdfIn PDF document text
    • http://ks4073.com/file_media/file_image/file/3160582416.pdfIn PDF document text
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/d24e4849d5dffef14124005766b3e707/nozobiv.pdfIn PDF document text
    • http://flooroverstock.com/admin/userfiles/file/lemisi.pdfIn PDF document text
    • http://yuhongzg.com/d/files/95154726759.pdfIn PDF document text
    • http://cdkkck.com/uploadfile/file/20210624215031.pdfIn PDF document text
    • http://mxagproducts.com/upload/browse/file/voporomuf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=emily+dickinson+hope+is+the+thing+with+feathers+themePDF 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_off0000d2d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2D9 16484 bytes
SHA-256: 92fda6b584e5ddfa45b01eaaf490a80ae73aa9d697174ae509323aeb05331149
font_01_sfnt_off0000fd8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD8C 11344 bytes
SHA-256: 1b7e4592845415e2e5b5a978ed7d0ec1fa83d3e16e30d2274a8873e10e775d86
font_02_sfnt_off000117e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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