Malicious PDF — malware analysis report

Static analysis result for SHA-256 80299c8aeab6d9a0…

MALICIOUS

PDF

96.2 KB Created: 2021-07-18 17:49:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 1d657b86f6e1caa08236dadd7f0df3b8 SHA-1: 5e5c701331d3053aa93f38c613016cdfdde70e95 SHA-256: 80299c8aeab6d9a0a4e26a9b93264a46bedb65f83600d31f29be0c2ae0f1351c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were extracted, the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

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://saunadlaciebie.pl/userfiles/file/47287283702.pdf In PDF document text
    • https://ms02bet.com/contents//files/68352700139.pdfIn PDF document text
    • https://www.paseppe.gr/ckfinder/userfiles/files/15934116297.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070eac400b82---67709877435.pdfIn PDF document text
    • http://ksnjl.com/userfiles/files/3743293092.pdfIn PDF document text
    • https://euroroma-bg.org/files/file/1881361473.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/43096b3ec3d42bd38e422dad1dd2b02d/fixipetikamerapovusa.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093a25522e7e---tejumenud.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/igjdvnu4hh7q0lk4n81qircpp3/gebujegikeleniga.pdfIn PDF document text
    • http://harchovyk.com/userfiles/file/govixitufap.pdfIn PDF document text
    • http://gfb.it/upload/fck/file/36087265612.pdfIn PDF document text
    • http://csc-0898.com/userfiles/file/20210612185231_y44upf.pdfIn PDF document text
    • http://aow.infogestnet.it/ckfinder/userfiles/files/14331299764.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16089bf1bd6b2d---vakijisaxo.pdfIn PDF document text
    • http://csc020.com/userfiles/file/20210702001059_v9mur8.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607669ad388fa---konigojigojefebelu.pdfIn PDF document text
    • https://rtvpuls.com/ckfinder/userfiles/files/2424176597.pdfIn PDF document text
    • https://xpress2.eu/ckfinder/userfiles/files/75953149599.pdfIn PDF document text
    • http://occahomesearch.com/userfiles/files/dipabewepuletatulowow.pdfIn PDF document text
    • http://sure2trips.com/bot/ckfinder/uf/files/jiduranatamene.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084063472532---xeruwapegipuwelulaliwul.pdfIn PDF document text
    • https://malashealthcare.com/userfiles/files/zepimudifemodivig.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/rp65tour10dfi8u7iictphaj0r/ramabulezogewinutorolag.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=doberman+ear+and+tail+croppingPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f3f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F9 10828 bytes
SHA-256: b4fb25d1f6bc1d96dd518401aa93cc24c2441142358d0cc5797f17dfbf5f2b4e
font_01_sfnt_off00010c6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C6E 16132 bytes
SHA-256: 3a5930a6deadf4be59c0f2d8d5ccd3da913488702965078b0d9630fdc68cf509
font_02_sfnt_off000121d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121D7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000139e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139E9 22404 bytes
SHA-256: 0bbb8403cf3eb97ed6dc2a70c65d19412371378bf25ed41f622f5b2459b75afe

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