Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bd7d7bc20401524…

MALICIOUS

PDF

78.5 KB Created: 2021-06-26 01:01:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 81ec9f60f04a1b6b2aea60cf10a34772 SHA-1: c25eac6a066781af18b1ae63a2bb0d18f847e6f8 SHA-256: 2bd7d7bc204015247250a12db1f7f60662c354172f9303cf9c5db4e727ba7c9b
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting it's designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. The presence of link farms and disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://laborke.ru/uplcv?utm_term=power+of+now+eckhart+tolle+pdf+free+download PDF link annotation
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/3k4d8ootib3bhreau5ns1ov87p/pekajokefanamiwifolaz.pdfIn PDF document text
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160bedb931d79a---57854594152.pdfIn PDF document text
    • http://chromatographvials.com/d/files/7660665565.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/bhevh4f4j0697q59u20hk67rcr/83814184534.pdfIn PDF document text
    • http://cn-junsheng.com/upload/file///2021528175811690.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607821783eaba---71344621456.pdfIn PDF document text
    • https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/63ugqjpi24o6l6fubsp1favg8s/gegutazojumodarinora.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/f47faf8443de0cc94e05ce6fb4a81bbb/50007293615.pdfIn PDF document text
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/405300c4642f0b812ae555691c7ac774/61970155059.pdfIn PDF document text
    • https://anthonygillant.com/userfiles/file/81661735282.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/533afcbda5e350f407b8e09c918d0b5f/tokekinivumubixasek.pdfIn PDF document text
    • http://giaodantanthaison.com/Images_upload/files/12595541382.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/kiebf62t65g52p8bp0t9j5s774/zotuwozuzebidevi.pdfIn PDF document text
    • https://jxloanchien.com/style/postimage/file/22740363022.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/160772a7dbf9e4---serufuwuvazifajegu.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d3f74e0129---kopijolede.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608efd57a8c5e---40557846710.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076890679962---85022163709.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a8138b465b3---nivimotagevu.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/c3ocbml209gpergbhqc7m1l096/bivajox.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/2c2rauds3bi12fjf6c3tslnd83/29862120277.pdfIn PDF document text
    • https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/uvcj9d6hsqbrtssl6b9ircj5ci/69984563179.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/zutufavesikomu.pdfIn PDF document text
    • http://shengnabei.com/uploadfile/file///2021062406285837.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/ac761f3c80784e6b0e756043891860a1/guviwasurofibudelob.pdfIn PDF document text
    • 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_off0000cf10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF10 10636 bytes
SHA-256: fd8d47df6e4a62a0c5e701a98318a278302a35c23749ddf2e099f2a221749776
font_01_sfnt_off0000e774.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE774 16544 bytes
SHA-256: 5cb17bc7400c8ac71bec5ca87389020de228f15583ec9d7bc31613bcb68832cc
font_02_sfnt_off00011298.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11298 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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