Malicious PDF — malware analysis report

Static analysis result for SHA-256 b60d60f96a69e85a…

MALICIOUS

PDF

85.0 KB Created: 2021-09-12 23:03:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d95a8e78d5bb81b3a96c57da813d60e6 SHA-1: ec84589961941496294676b13d4bf3ec285cecd1 SHA-256: b60d60f96a69e85a74ebc13bf97e64826507229bdf44514bc9ef0be3a896e156
164 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download button' heuristic further supports a phishing or social engineering lure. ClamAV detection and ML classification confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://patoman.ro/ckfinder/userfiles/files/danaweruvojazuzep.pdf
    • https://sammycar.ch/sammy/sites/default/sammyfiles/newsletterfile/99520933338.pdf
    • http://djapm.com/userfiles/file/37572338880.pdf
    • http://copingconversations.com/userfiles/file/sojigivef.pdf
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/6675ef736e77b35d74102ac492a3526c/73728948283.pdf
    • http://lasantitosrestaurant.com/userfiles/file/43159579326.pdf
    • https://pcetravel.com/files/file/79861676371.pdf
    • https://12shio1.com/contents/files/ruxivuxeku.pdf
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/f9b51cb115a19765965035c6356e61dc/97541367110.pdf
    • http://lynxitservices.com/ckfinder/userfiles/files/watixokafifizevagu.pdf
    • http://inimtrento.it/userfiles/files/42944556300.pdf
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161378f192fe45---dufewaw.pdf
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16132db473d57a---gelifejurilupemotik.pdf
    • http://hodori247.com/uploads/files/mofutisevekajuv.pdf
    • http://tunesistudio.eu/userfiles/files/novejogodekavezulage.pdf
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/c170qide444ct6gbluid16dr1t/zemomu.pdf
    • http://champagne-marc-chauvet.com/images/files/46905803488.pdf
    • http://sevinctekstil.com/resimler/files/masofimexa.pdf
    • http://vektor-bezpeki.com/userfiles/files/ketezivolovemof.pdf
    • http://worldcar.jp/userfiles/files/jakagewalugexir.pdf
    • http://campingwithconvenience.com/files/files/ninegorifosines.pdf
    • https://segurosjdd.com/wp-content/plugins/super-forms/uploads/php/files/7hke47h2mknj6fhqla56ulnis7/dasibumelibofubuxufos.pdf
    • http://hc6999.com/userfiles/files/46286332040.pdf
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/161398491ae855---63059185699.pdf
    • http://getvisa.ru/images/File/65527907750.pdf
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a5f673c924---bawowogiledot.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=download+isoken+full+movie+netnaija+com
    • 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_off0000e80c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE80C 16792 bytes
font_01_sfnt_off00010023.bin
ef53e52cd60a55374ba0b114bea5ea582aefbc4763a0e47b6ef35ebc02b7d87c
pdf-font-stream PDF embedded font (sfnt) at offset 0x10023 11012 bytes
font_02_sfnt_off000119c1.bin
7edd18aa589f8170a6ea05d14e687ad2088b9f3162f833e817deb5c0bce6cb22
pdf-font-stream PDF embedded font (sfnt) at offset 0x119C1 17256 bytes