Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee0a83b59a0ef609…

MALICIOUS

PDF

84.7 KB Created: 2021-09-06 23:36:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: dab2d73a1e6f489a1bc5c7e9f8962ea4 SHA-1: 7fd553867076e879650fd192114a09a744ba17b7 SHA-256: ee0a83b59a0ef60968a654100df950351b701f073d4d09a0e551d82d2c8ff536
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, with numerous URLs pointing to compromised WordPress sites and other disposable hosting, likely serving as a lure to download further malicious content or phish for credentials. The presence of multiple external URIs and link farm heuristics strongly suggests this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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 http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/64fa9e706c4e1f66df0a97013b93d4ee/52063946216.pdf In PDF document text
    • https://0286869143.com/editor_images/files/digusadujiviv.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/a6sedtbb11kr7ena0vippe1tpe/geminozusolazekogubemuz.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/a10bebbe1a9159cc583c61a9dfc2fc58/fakakulejimemixige.pdfIn PDF document text
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16086052bf077f---77807991662.pdfIn PDF document text
    • http://iraneto.com/basefile/iranetocom/files/60925075478.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/d9bae64c572fdf697ad1a834001fe296/lupuzomifomenozuvajo.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/5e28331d328b401f6259051e23bb2dbc/95043442002.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/7898096b0337075e80c75354ce2e3dd7/67231034122.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ccd6b6912f7---nizutexiso.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606cac7f98d2c---70014404813.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/rbmn31o209khe9sapdqjovdamc/vutuzizosajavo.pdfIn PDF document text
    • http://soft-pro.hr/upload/datoteke/pobirigifafabikodovamez.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/81e3b3789cd03d505fd9dbdbbda37706/zedutajavadorug.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/c65bbadd0680be537e6a393b601e9e01/76233166530.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c353e4fe87---sovoralebigevemugenun.pdfIn PDF document text
    • http://foto-klub.dk/userfiles/file/31510476757.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/8680f5311a0cbb476c244e4ab827c77f/15062455529.pdfIn PDF document text
    • http://adbuilder.at/ckfinder/userfiles/files/69886440255.pdfIn PDF document text
    • https://securityguardsupply.org/php/uploads/file/41724404106.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160780da33a1da---83252146008.pdfIn PDF document text
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/aadd0f16f9877a9382dd969f8a4880fc/5277813296.pdfIn PDF document text
    • http://linhkienhunganh.vn/luutru/files/piwilaxobeve.pdfIn PDF document text
    • http://innovatepc.com/userfiles/file/jurozojosukiranixolesik.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/nafirofilog.pdfIn PDF document text
    • https://www.sixteengrams.com/wp-content/plugins/super-forms/uploads/php/files/u2opoh1gs94o7j59cnn2mcsd5g/mexijopizijewitakurugaj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=surgery+at+a+glance+5th+edition+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_off0000e49f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE49F 11156 bytes
SHA-256: 3cba84c3dde02522873d3c32c2262891ca032264f6fa801b897544cd894351e6
font_01_sfnt_off0000fe7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE7F 17728 bytes
SHA-256: ca520323bf789ae77fe1fd2cbcd62373c9bdd58f3b5433977839d1571d4448d4
font_02_sfnt_off00012ca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CA3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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