Malicious PDF — malware analysis report

Static analysis result for SHA-256 be29a6d01c383141…

MALICIOUS

PDF

84.6 KB Created: 2021-06-30 17:55:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d4583980c640ab228b11a28b863e304d SHA-1: 58abc41207f22146b86217b26d31b2e9b6056a0b SHA-256: be29a6d01c383141cb7503cff989f671849d991d3895ba899e043fb6fd43db51
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the presence of numerous URLs and the nature of the heuristics point towards the document being used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9762

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
  • 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://crewmak.ru/uplcv?utm_term=in+the+figure+a+square+is+inscribed+in+a+circle
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/6d6f542237c2f93b69494cd983ae7733/riwowivesube.pdf
    • https://conexkarvan.com/cache/fck_files/file/wisigo.pdf
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/7ce40aaf62d53e178c82c64a761a6d92/daloxi.pdf
    • https://pypconsultores.mx/userfiles/file/tenulodiromusoresulubub.pdf
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160a7be2e245d4---ludijawodu.pdf
    • https://machnhaduong.com/images/uploads/files/13645069684.pdf
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f2835a54e7---68098897896.pdf
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/noahmca06mjjsj54ku93u4rru1/83058916175.pdf
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096728463050---sutudeti.pdf
    • http://bsl-trans.ru/admin/ckfinder/userfiles/files/kidejosa.pdf
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606caa3d94d1e---boramekidulunomobat.pdf
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c03a1e74e99---mulufejatoj.pdf
    • http://e-kva.ru/admin/ckfinder/userfiles/files/12230367017.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/obds7p9m3dpik8fkujum56h4s5/zilezexuvazekajuna.pdf
    • http://mwflower.com/upimagesfile///52734155113.pdf
    • http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/wobukiwux.pdf
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608d19f33a9e8---19497344746.pdf
    • http://altelaw.com/uploads/image/file/faxixeramukebubusosi.pdf
    • http://bodegaadrover.com/userfiles//imagenes/55426507501.pdf
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607a09947945d---tofanusigokozizipesibas.pdf
    • https://nothingbutsafetyglasses.com/userfiles/file/75102708792.pdf
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/aef659906123e5d74121b019467a8e3f/84220992589.pdf
    • http://s8radziejowice-paszkow.pl/userfiles/file/96865029529.pdf
    • http://www.asap-recruitment.net/upload/file/88049705346.pdf
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/m04kiq8c9f49moe1e9licd5uuf/94811593115.pdf
    • https://x-software.cz/data/file/kubebafamawekoga.pdf
    • https://divinesacredshakti.com/wp-content/plugins/super-forms/uploads/php/files/1df5df80ac06abb6d67b45abf7d36dd5/degukaxitobowavanuxewade.pdf
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/34e6262b867bd2f6d98fbf3d6197e50d/fozazel.pdf
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c3e6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC3E6 16792 bytes
font_01_sfnt_off0000dbfd.bin
55cda39f6fe8980db8a5c440e342e859f9098ed76afb2a3e3c6113d131de41d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBFD 10972 bytes
font_02_sfnt_off0000f4d7.bin
d0fffa86793ae8028ca966fe54d18dbb96d228e297afc5145a4b75e76d5ed72e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D7 15868 bytes
font_03_sfnt_off00011db8.bin
40d950a2ac9bfedae3c56d36a715ea51e0078c83a1439467e12fe0611f20f9ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DB8 11256 bytes

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