Malicious PDF — malware analysis report

Static analysis result for SHA-256 952d54982200f75f…

MALICIOUS

PDF

95.1 KB Created: 2021-06-27 15:51:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: d2c550b836e8e29166f5b76c06c7fa61 SHA-1: 34cf99c7016c50d87fe3808622876ec806b837ce SHA-256: 952d54982200f75f6ba9cd3ab8b8cbd3d0d6e2259636530ff5f2f2643f317180
164 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for exploiting PDF vulnerabilities to download and execute malicious content. The presence of numerous links to compromised WordPress upload storage and disposable hosting further supports a malicious intent, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9927

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://playbabydoll.com/userfiles/file/45372215067.pdf In PDF document text
    • http://berallebags.com/UploadFiles/FCKeditor/20210614051741.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/fokesikalexanuf.pdfIn PDF document text
    • https://hoalavender.net/upload/files/nokaxemabe.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccaf742609---julita.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/tazaxo.pdfIn PDF document text
    • http://shiinamotors.com/js/upload/files/midilapigibabaxa.pdfIn PDF document text
    • http://exclusivelimoservice.com/ckfinder/userfiles/files/nepari.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/613bda2b618ae55e738a970ab2887c60/ruwabawibunufonidev.pdfIn PDF document text
    • http://patrick-vallot.com/upload/files/weboxe.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/83126867600.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607b20b4ce9f2---vobigowamalo.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/8u237k1g9dtg3v9sg1gg5jqd2n/60669875602.pdfIn PDF document text
    • http://bhttourist.com/upload/fckimagesfile/947701914.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/wuzosabitimivusi.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/cab364a8f67f07bacdee08bcd23e0689/74250660548.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/1j9122d8cuf035u8ft86g62cu6/76968852173.pdfIn PDF document text
    • http://bukharajohnscreek.com/sites/default/files/file/44082632799.pdfIn PDF document text
    • https://people11people.gr/uploads/File/dabegim.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16078052ccbead---gogero.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/f99d66f870c70f17c3f15fcd907999bd/98784007524.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/spjthujekblmm3tir5qm5dknnj/nofatod.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/bb3ef962ac712c68d1888f7083b57c40/19651291632.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=place+only+bettingPDF 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_off0000fa50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA50 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011267.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11267 10392 bytes
SHA-256: ddc4f2329745e53a882b8cc097e022ccfb351b066dd7a2e06d557ab438a37b6d
font_02_sfnt_off00012a14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A14 17340 bytes
SHA-256: f589d973648e2a64656c636a170c47186970e3c29803a4098fb4cee8b8237444
font_03_sfnt_off0001576c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1576C 16340 bytes
SHA-256: 88a5f3ad9079b2340172ecd64f1cd79ba1ad1753eb2b73e58de10c5a7be67d15