Malicious PDF — malware analysis report

Static analysis result for SHA-256 068f6c24ab6a7c9b…

MALICIOUS

PDF

77.8 KB Created: 2021-09-07 10:52:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1c4dd7c07b414808ac70da8d5d490ca6 SHA-1: 6846b7f52db0176a4e509cbb0f414b53954a0a1c SHA-256: 068f6c24ab6a7c9ba7b4af5d7a3dd8a0251ba27e8e3a62ddbd5671523678bd4c
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 high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress upload directories and other disposable hosting, suggesting it is part of a link farm designed to redirect users to malicious sites. The presence of external URIs and link farms strongly suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/16081567e22465---97178230923.pdf In PDF document text
    • https://bakotech.at/uploads/ckeditor/files/suvuwo.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160861906cea88---wumuredosi.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c25efb1eb58---siruzavajazotu.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160848d6aa3890---55154145615.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/260838055149.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/d215072b225f4caa5ba09561eb0e3e57/litikibego.pdfIn PDF document text
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/eed3647abf104609dc803d573d565d31/32411766974.pdfIn PDF document text
    • http://www.liveartsaskatchewan.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d60bada2949---69208549624.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc241ea211---jenuvawibebanel.pdfIn PDF document text
    • http://www.florentmaussion.net/userfiles/File/nojajeniloxaritunivukadak.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a31c88a6a23---mafinuzafexotozifujoz.pdfIn PDF document text
    • http://chipmax.in/chipmax/ckfinder/userfiles/files/xasaletinejofakemokewo.pdfIn PDF document text
    • http://nothingelsematters.net/pharma/images/files/16838333567.pdfIn PDF document text
    • https://agentcctv.com/userfiles/file/dutut.pdfIn PDF document text
    • http://cleanyachts.it/writable/public/userfiles/file/92282359279.pdfIn PDF document text
    • http://yucehukuk.com/resimler/files/57471223711.pdfIn PDF document text
    • http://studiobaliva.eu/userfiles/files/tifoke.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612c4a5255a5c---44835305422.pdfIn PDF document text
    • http://jsushibrea.com/uploads/files/2681398530.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160f61e1069b2a---36847819094.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/9c6982d3b3f6b8b599148c2b053bb868/morujavonu.pdfIn PDF document text
    • https://willmarlakesarea2040.com/ckfinder/userfiles/files/42298185366.pdfIn PDF document text
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16105688a21800---45847944115.pdfIn PDF document text
    • http://www.beautyvogue.ch/Files/file/bazosorimafoxuxibawileme.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=myanmar+employment+law+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_off0000ce0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE0E 16732 bytes
SHA-256: ea476bd490dadf7b70432a9dec2430bcb4b2f85459f5b7571ad4b87f4c11957e
font_01_sfnt_off0000f943.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF943 10592 bytes
SHA-256: c6c085e7d571d798442e7c0b62f6c9bb8ddd609c3c3946402ed1d139f72ab191
font_02_sfnt_off00011175.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11175 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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