Malicious PDF — malware analysis report

Static analysis result for SHA-256 39aebce77d4c96ec…

MALICIOUS

PDF

78.4 KB Created: 2021-08-04 02:16:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7f2e0c702340ce19383cb0e037a09bca SHA-1: f33e9c831737f44a8df0a5b77f255d2dbcfe956d SHA-256: 39aebce77d4c96eca976a38673105ee007bbb37741579cd28e37287a9871ee7b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a link farm pointing to multiple compromised WordPress sites and disposable hosting, likely serving as a lure to phishing or malware download pages. The embedded URLs suggest an attempt to redirect users to malicious content, potentially for credential harvesting or further infection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/uvb6cdams6o2cbv0up6q13lbh6/julenoxomapelo.pdf In PDF document text
    • http://taispacedesign.com/upload/files/31872992998.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/vi89qvpff1n4l0fme0o1mvl9b3/kotesuxufizigoged.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160840f4dd4100---60101895175.pdfIn PDF document text
    • http://henanshuangxin.com/d/files/25864787943.pdfIn PDF document text
    • http://www.sandzthabapanel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607db1a2c0c9c---lapopizudururedir.pdfIn PDF document text
    • http://decom.pro/admin/ckfinder/userfiles/files/81945587552.pdfIn PDF document text
    • http://dmscsmartlifeblog.com/userfiles/files/wedoni.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a503a979beb---vibejuwuperutoja.pdfIn PDF document text
    • http://halaljones.com/uploads/files/pizopejixujajawufiputob.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096c385a0297---lataxak.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f185d891702---pagabopujitagi.pdfIn PDF document text
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/3390a385d6bf31c9bc92541b7f1d7738/wologuxurevuzoz.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077075e57ca3---sedodilirab.pdfIn PDF document text
    • http://vigova.com/Images_upload/files/soxizafed.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/58590798704.pdfIn PDF document text
    • http://marta-galan.com/files/varios/file/dupalolexudog.pdfIn PDF document text
    • http://telegid.tv/userfiles/files/wawozagewuborino.pdfIn PDF document text
    • http://covinahigh1980.com/clients/1/14/147ee80f0cf2e08ca1b5067d21485a43/File/23720016082.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160ab89f07c2d5---92521206762.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16077473bbd3fe---tufopedotuladonutafag.pdfIn PDF document text
    • http://jaatkinson.com/userimages/59014956036.pdfIn PDF document text
    • http://instant-image.net/UserFiles/Site/File/tarexuteluxunofix.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/3b5dd9985a04f12aba4593084338ed42/tatumumokex.pdfIn PDF document text
    • http://naturallabs.de/userfiles/file/53140406199.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=ejercicios+verbos+irregulares+presente+espa%C3%B1ol+pdfPDF 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_off0000c9dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9DC 17476 bytes
SHA-256: edf7ead7eeedff6123becefc4369a526149b05b5f068476cdee0dcad2b388730
font_01_sfnt_off0000f65d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF65D 11420 bytes
SHA-256: f075b3ec9ab4adc8b002a71840d8fab13874abcf2bcc211c0cdc7ba015cdd65f
font_02_sfnt_off000110c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1