Malicious PDF — malware analysis report

Static analysis result for SHA-256 12f5ceed5018620f…

MALICIOUS

PDF

86.0 KB Created: 2021-07-25 08:09:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3b9f4e786a73723792174323ae289f78 SHA-1: b0a17334185211d1984d9d430579451a3755462d SHA-256: 12f5ceed5018620fe1ea50cf55c8695c274cc83ab9c9104ffeaeb44be43a8697
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains a link farm pointing to numerous compromised WordPress upload directories and disposable hosting sites. These findings strongly suggest the document is designed to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://promise-land.com/upload/file/karazagigipabixaxufi.pdf
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/118d50fa9f54deeabdb7b19dad9c33f0/xoligel.pdf
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160926cf05a935---povikinisogegukebunewolep.pdf
    • https://tahitotfalu.hu/ckfinder/userfiles/files/43858694615.pdf
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ac16d824577---6199931000.pdf
    • http://kemenyseprosiklos.hu/upload/file/tibaxadibixokukavawojurot.pdf
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/425995a5f8b78bfa6a435b3fc6a5c346/2690127227.pdf
    • https://wtmasonry.com/ckfinder/userfiles/files/70738343543.pdf
    • http://schodylux.pl/userfiles/file/90833968305.pdf
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a052952c096---49801250495.pdf
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/25saloc005414hpkg8d5aeeld4/23191012253.pdf
    • https://www.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/mrkve8dodic1c6km0tmpnifkrk/lovojaliteweromizubi.pdf
    • http://langfordfinancialservices.com/userfiles/files/tolarox.pdf
    • http://essiac.cz/UserFiles/file/susud.pdf
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1609ffe963c394---lumelosajowifulavudepe.pdf
    • https://poolpoint.be/uploads/file/zewuwexozozojebafu.pdf
    • http://arniestribu.com/campannas/file/20041020279.pdf
    • http://vinaktv.com/storage/ckfinder/files/wonugewi.pdf
    • https://vestol.bg/files/file/35402783211.pdf
    • https://cortemadera.com/wysiwygfiles/file/41289203694.pdf
    • http://fine-cottage.ru/userfiles/files/bufudibez.pdf
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1607dd8ce047cb---68177006740.pdf
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/b5dac1bccde1aaedc5c1fb2148a226a9/28170576037.pdf
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a863d0cf5c---85248803299.pdf
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606caac022259---58892507075.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=what+is+expansionary+and+contractionary+monetary+policy
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9df.bin
5eccaaf270d407c2577549b7ebe66f9c1e466aab11f72a50dd7c7ea717aceee8
pdf-font-stream PDF embedded font (sfnt) at offset 0xE9DF 10988 bytes
font_01_sfnt_off00010340.bin
9b875c7f3c8b4336c4b9ba65994c7bfbe44d6a71666c215d5fa9ff725041afba
pdf-font-stream PDF embedded font (sfnt) at offset 0x10340 17604 bytes
font_02_sfnt_off0001316d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1316D 16792 bytes