Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2ec0056302d625d…

MALICIOUS

PDF

84.4 KB Created: 2021-06-30 00:32:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a484894df1edc8aadc06bbac4a1d474d SHA-1: b8848623d669cdb851b1e2d5adee2455258d3975 SHA-256: c2ec0056302d625dfe3bf5bffe337f51cb470aec911f53e214ec2626dede6df1
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous links, many pointing to compromised CMS upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of UTM parameters in some URLs indicates a potential phishing or spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a65b7c5b661---zejigibabinizugogutiroxob.pdf
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/3657535e3a468e679f76f2c96c533469/22914432765.pdf
    • http://bfr-bialapodlaska.pl/userfiles/file/jovidifasapajavolu.pdf
    • http://www.aqsclimited.com/EditorImages/file/ruwov.pdf
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/qnl5i49b1rl0qmgkn3pkoldcfu/vaxotix.pdf
    • http://sam-global.info/files/file/10751363466.pdf
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/cj352rgg3cvo3sa10een6l4fmm/98535447281.pdf
    • http://mastervgtour.by/var/upload/file/84208724732.pdf
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/08c45b40b33d4cb256e30a09d411f62e/73831808776.pdf
    • http://dermalab.pl/userfiles/file/levuminubunuta.pdf
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160db8d28833ee---82417627308.pdf
    • https://www.basur-tedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160753b602bd30---sakowibo.pdf
    • https://powermailer.in/userfiles/file/gofexiroxogutil.pdf
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/nu8sngodvs90baevmeo6degfrc/wubipopix.pdf
    • http://jullien38.com/ressource/site-image/files/tigakubedojowometagaf.pdf
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/543e4fa451163f49bb34efcff03967c9/61175171771.pdf
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/2d80a4543c49d550c3ddafdaa2962b50/30529398981.pdf
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/oihq11batkvf572vja3l1r9d7o/bokejadepibaxevovovik.pdf
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a446ff1543a---numisefikupezipiramowigu.pdf
    • https://olgapopovaphoto.com/wp-content/plugins/super-forms/uploads/php/files/c07d8af455e0797aced9dcb650b5b46d/82416462904.pdf
    • http://guchenes.com/d/files/33232008827.pdf
    • https://kristinanamaste.eu/files/wamirovi.pdf
    • http://weddingdiy.cc/uploadfiles/files/20210601_224750_2340.pdf
    • http://scenekunstskolen-efteruddannelsen.dk/ckfinder/userfiles/files/dujekosaregeduvoteji.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=the+great+chain+of+being+macbeth+quotes
    • 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_off0000e7a8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE7A8 16792 bytes
font_01_sfnt_off0000ffba.bin
0a1ad56d8fe393cb4acbea9aec40dfdd1cd1db84d14b11d78f16d5606b99cef1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFFBA 16740 bytes
font_02_sfnt_off00012afa.bin
ae7a21aa233a429ca1c8217f337b0afd31069716030bf0f0cc99ae1bb93bddb3
pdf-font-stream PDF embedded font (sfnt) at offset 0x12AFA 11084 bytes