Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bcd795ae24909fd…

MALICIOUS

PDF

79.0 KB Created: 2021-06-27 02:28:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 87c7e545cbc3de9a30468c4c9fa01f33 SHA-1: fe3ce51b1a3c78820ad102a0be8ff682062f8487 SHA-256: 2bcd795ae24909fd653f523bd94155b4ca3b6b5a065fb5540e3bbe9ba17d8377
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as 'Pdf.Phishing.Trojan' and an ML classifier indicated a high probability of maliciousness. Heuristics indicate the document functions as a link farm, directing users to multiple external websites, many of which are hosted on compromised CMS platforms or disposable domains. The primary goal appears to be directing users to potentially malicious or phishing content via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/3f02b566e9c17caccf84285b925be8ed/bodar.pdf
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/oldhf5aats34agsu8ju0ap5ao0/pilebadekoni.pdf
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/1609fbb94ac97b---xosejotavagemi.pdf
    • http://bugaboo-buffalo.eu/UserFiles/File/45901482774.pdf
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160ad9fb59703c---40689616028.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086e644eedcc---28525835866.pdf
    • https://fleschimmo.lu/userfiles/files/kejoru.pdf
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/ptveifqssd1p4mbn987nd6bjlt/wilurixajodulenovorumubid.pdf
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a5b0f608bd3cdbdcbb17be1d86b45953/11805777230.pdf
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/1lb645l01taer7e9ssqeqmmpv0/jexatefun.pdf
    • https://podereilmontaleo.it/writable/public/userfiles/file/14583582552.pdf
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/e269abe36401834421d1741c93f17135/275928297.pdf
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab66e31c6a2---wesevurigaxupiwu.pdf
    • http://grupogmec.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1b0ff05700---32636133288.pdf
    • http://texmet.pl/userimages/file/sekadexufatadagexebesab.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/p8n0ahibni5ee7kj2958au8o0a/19667398064.pdf
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1609832af5a7a8---girajotebajorujodeti.pdf
    • http://veterina-hrib.cz/user-uploads/files/9613784006.pdf
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/90fe35db1cc1d0f4078c7caab99eaa67/gipojinobalixibegimepid.pdf
    • http://absolutelyneon.com/userfiles/file/76924638609.pdf
    • https://parquesanalbertohurtado.cl/ckfinder/userfiles/files/33635742374.pdf
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606f202650661---99306846267.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=linux+all+in+one+for+dummies+pdf
    • 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_off0000c735.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC735 16792 bytes
font_01_sfnt_off0000df4c.bin
2e22619b17de6cc2cfa865eba5f08f57b86b303f586193d966f07b156a14e8ae
pdf-font-stream PDF embedded font (sfnt) at offset 0xDF4C 10720 bytes
font_02_sfnt_off0000f7d6.bin
2a125e517c7037bd6a827c4546ec1a319f41198ce5d59a1b383275757590c563
pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D6 22808 bytes