Malicious PDF — malware analysis report

Static analysis result for SHA-256 05ae8f9b4ab40b1b…

MALICIOUS

PDF

73.6 KB Created: 2021-09-19 23:12:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: a7953c3d08456d41eacd0a0e8b1f18f5 SHA-1: 01c9dea6530229cb3945944a15e93a08f5c1dbd6 SHA-256: 05ae8f9b4ab40b1b5661e4b8dadd4f6d470df8cfd0777539a4e48bb0a1aec567
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file containing embedded JavaScript and multiple external URIs. The heuristics indicate it functions as a link farm, with several URLs pointing to compromised WordPress sites and raw IP addresses. The embedded JavaScript and the nature of the URLs suggest an attempt to redirect users to potentially malicious content or phishing sites, aligning with spearphishing attachment tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://huntic.ru/uplcv?utm_term=anime+sites+to+watch+online+for+free PDF link annotation
    • http://tinavaron.com/ckfinder/userfiles/files/83478049503.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/a80ff636df1d23c247f591a14e8d8e68/vofomufomo.pdfIn PDF document text
    • http://franceplus.fr/userfiles/file/10682346030.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/a600655c15a5a5955a7972185a583afb/47361738640.pdfIn PDF document text
    • http://cdkuys.handysociality.com/upload/files/16210800111.pdfIn PDF document text
    • http://mmbassisiprovince.in/files/js/ckfinder/userfiles/files/71549059574.pdfIn PDF document text
    • http://rcp-ranstadt.us/files/95308421684.pdfIn PDF document text
    • http://studiosimonepantaleo.it/userfiles/files/28253977951.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/161425e73881f2---15979023183.pdfIn PDF document text
    • https://cicadit.ro/UserFiles/file/rakinetujito.pdfIn PDF document text
    • http://zamdq.com/filespath/files/20210906231216.pdfIn PDF document text
    • http://pierrevillers.fr/mairie_files/file/mosogevuxir.pdfIn PDF document text
    • https://cqhuaan.myhost360.cn/upload/files/09-18-16-13-01-22.pdfIn PDF document text
    • http://classicalgardenstatues.com/uplds/file/2083039479.pdfIn PDF document text
    • http://www.buildonhope.org/file/kizoxuboxunagozifab.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ab9c901830---86876638056.pdfIn PDF document text
    • http://140.121.161.111/ckfinder/userfiles/files/givolu.pdfPDF link annotation
    • https://twinslock.com/locktactyuma/userfiles/file/bakazelikejufa.pdfIn PDF document text
    • https://101doctor.com/uploads/ckfiles/files/613ea51f5361e.pdfIn PDF document text
    • https://orderpoet.com/ckfinder/userfiles/files/zobubewunab.pdfIn PDF document text
    • https://servauto.fr/img/user/file/79129425925.pdfIn PDF document text
    • http://bjerkelunden.org/content/files/userfiles/file///37594004649.pdfIn PDF document text
    • http://myjobcareer.net/userfiles/file/2021091609103973499.pdfIn PDF document text
    • http://akiyastyle.com/app/webroot/js/ckfinder/userfiles/files/94439098108.pdfIn PDF document text
    • 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_off0000bf26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF26 16084 bytes
SHA-256: b1dabb3d88090aab3cae8c2cb0086d00e8c05e85c19ba121293048d262048831
font_01_sfnt_off0000e838.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE838 10668 bytes
SHA-256: 025ad60f4af4cc65f9187bdad29313e84e90f806bbe7a234cdbbf22931852c95
font_02_sfnt_off00010090.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10090 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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