Malicious PDF — malware analysis report

Static analysis result for SHA-256 512155bc8d78fd79…

MALICIOUS

PDF

84.6 KB Created: 2021-07-06 15:27:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 9ae5320d763ee494c43203d7bf927446 SHA-1: 3182dfbda70c346274336abcae0f5f5dbbd94940 SHA-256: 512155bc8d78fd79a8638ed259a3483621094a5454456c7752e5afddd02dcaa9
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to potentially compromised websites and disposable hosting, indicating a link farm designed to redirect users. ClamAV detected this file as a phishing trojan. The presence of embedded URLs and the nature of the heuristics suggest this document is part of a phishing campaign, likely using spearphishing attachments to deliver malicious links.

Machine Learning

  • Nyx PDF Classifier clean score 0.2133

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://curtisfamilyfun.net/clients/e/e0/e02f67ab5b6879a7eb6c21a3163f7106/File/8133008722.pdf In PDF document text
    • http://kbchina.de/upload/govuwipadaxositojabised.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d6a67f3777---71603088671.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160986bfc4afd9---munojaxanetoke.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/2vg4d9mugnhjia8nnehcqarps2/42256392588.pdfIn PDF document text
    • https://daaeportrett.no/upload/file/melovakubexidukorugimisan.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/b6b8cc047ee5a8bb8ff2453c4b8fa17f/76633860480.pdfIn PDF document text
    • https://ebooksweb.net/files/file/zosekekofifiwufudagoxi.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160da29125e167---37520272820.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2772354eb8---gezifuzisufiluke.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/f73946eb2161f347e58b24e57f875ec9/suragasuvidipulorupudeg.pdfIn PDF document text
    • http://webscape.co.bw/wp-content/plugins/formcraft/file-upload/server/content/files/1606f7b79567d7---wukokakixowukawepor.pdfIn PDF document text
    • https://corpusbg.com/files/fck/file/zerodolerigonewewalu.pdfIn PDF document text
    • https://parfumzone.ro/files/file/29838862999.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/as33fpa64iudjthbra8s3tlpd3/69456453807.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/d63289c1062717e7ff40507fe9106eaf/naguporet.pdfIn PDF document text
    • http://casier-a-bouteilles.com/file/gedetadusixig.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a413b237576---rotilavoradivezazamesigaj.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/dusitebixojifejebu.pdfIn PDF document text
    • http://built.lu/userfiles/files/26539262863.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a832e74b9c3---96603542216.pdfIn PDF document text
    • http://sip7.online/wp-content/plugins/super-forms/uploads/php/files/a1e90c2c4be8041e48fa1fbbffd740d0/fufuveweliveb.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/67m36cf32pcn9eisurmge4stm1/vawepavijav.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16094a156d392a---temifupatasuk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=2.1+pounds+to+kgPDF 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_off0000f495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF495 10368 bytes
SHA-256: c07c6f92ffd3d633259db6d2dcdcf1a5d96db903f2f46d42f49758e954687b83
font_01_sfnt_off00010c04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C04 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012416.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12416 16940 bytes
SHA-256: 94877d3327b4193f467880a9e77cfc457af8a4d9b46b0cc0be818090ea1c6a92

Open this report in the interactive analyzer, or submit your own file for analysis.