Malicious PDF — malware analysis report

Static analysis result for SHA-256 60bb35646f419b20…

MALICIOUS

PDF

92.6 KB Created: 2021-06-26 03:00:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: ba8d5e501752988ea8ac9a4e178350fe SHA-1: 533be780159c2b6e1a263208ea2c2bf9e9fb9467 SHA-256: 60bb35646f419b206c5bcd08c4b6fccdcbc6f5bf4d1bcc8384381fad49e2c12d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised WordPress sites, suggesting a phishing or malware distribution campaign. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to trick users into downloading a secondary payload. No scripts were extracted, but the overall structure and URL patterns are consistent with phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9746

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://allytemp.ru/uplcv?utm_term=excel+to+pdf+converter+online+500+pages PDF link annotation
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/1dd6fd3b644817dee046c138e3e97521/43759016487.pdfIn PDF document text
    • http://haniltm.kr/upfiles/editor/files/78302742939.pdfIn PDF document text
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae83654ef6---21247346272.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607e4c0677df7---diralojud.pdfIn PDF document text
    • http://zentrumok.com/userfile/files/paxuzokuvarixu.pdfIn PDF document text
    • https://chauphongasia.com/wp-content/plugins/super-forms/uploads/php/files/5gsf6n4se1irkaricqrihb34j6/38248094191.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/ias96vdd760c627s72fum3r6i8/bafakafuvibisevagefomigeb.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/tuqb6gk419bf7veru2nn9oes1l/54074209003.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/163a11da59bee61eddad343d423097b7/tuxevedefeduxulotakuz.pdfIn PDF document text
    • https://iwistw.com/upload/files/58795331561.pdfIn PDF document text
    • http://www.520amis.com/upload/files/87257061564.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608570b2ada5c---92712700116.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/j1lv5ahj5apaq4dronul8uvg6i/80438419096.pdfIn PDF document text
    • http://aggengr.com/uploads/CMS/file/kisojaginofizez.pdfIn PDF document text
    • http://biosite.ru/images/news/file/28290853357.pdfIn PDF document text
    • http://phutungvespaco.com/luutru/files/buwidonotomew.pdfIn PDF document text
    • http://www.atrium-tuiles.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d444758585---fogejana.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/66a92f9d1f7441ec25f88913358f1cd6/dajafevebi.pdfIn PDF document text
    • http://kashima.cc/userfiles/file/58758937229.pdfIn PDF document text
    • http://asesorgubernamental.com/images/file/riwupovimoj.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/11190531a8274888553ff91270e639f2/busurudemexemadub.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160827177a6830---zelasepapa.pdfIn PDF document text
    • https://impariant-club.ru/wp-content/plugins/super-forms/uploads/php/files/25bad478c86072bd7ff24e239b620bab/28058587247.pdfIn PDF document text
    • http://jingluo.net/uploadfiles/files/62921165314.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b2ef58c509a4bac4987eadbf8e582da7/pomemizewimexasubi.pdfIn PDF document text
    • https://aterhesseg.com/up_image/file/21013142047.pdfIn PDF document text
    • https://drrajanmahtani.com/userfiles/files/ripatofibigipa.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f129.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF129 16712 bytes
SHA-256: 5c6218a45f10afbc2d0a2ce7f6b667af336474a2f887d319e69c0c4165cffc95
font_01_sfnt_off00011c7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C7D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001348e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1348E 16144 bytes
SHA-256: fcca37035df06e555c2991ff65faa0e8497ca6423bee408ebc46b3aef925b516
font_03_sfnt_off00014a0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A0E 11200 bytes
SHA-256: 61fc23daae6a3be4f830352029827c825417cf299ff38e6756ecf54c32347266

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