Malicious PDF — malware analysis report

Static analysis result for SHA-256 03e0df9294fb3df7…

MALICIOUS

PDF

79.7 KB Created: 2021-07-02 10:08:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9b92e1ac5c6ab8e45393c08e0b560143 SHA-1: 011d48c7950ee9a006304e8f111abf4492fa52d3 SHA-256: 03e0df9294fb3df72d9c9e4eb12fae6cbc88ee6c5a11858b56b28a8f4118042a
156 Risk Score

Malware Insights

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

The PDF file contains numerous links pointing to compromised CMS upload storage, indicating a link farm designed to host and distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are consistent with a phishing lure or a downloader.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b45e7965c34---zelorojofanuwuson.pdf
    • https://wickedcheesy.com/images/file/sagepoxikuwasategu.pdf
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/186d83565bff23c056c3276946817b00/pebopizoziju.pdf
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b322d8bad0e---vixobigigugiravogibivone.pdf
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a4b030fdaf---5386113799.pdf
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607384eda6f94---pigosasiki.pdf
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c93ff9933bf---jafuxosibafenadija.pdf
    • http://archi1919.com/smlclub-files/file/95204720083.pdf
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/ba3e9a88b3f6f79bc5b697cd83a7c8d1/gogurukusejufiz.pdf
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/007e2f8babb773d4fbfef1d2f493ac39/fobinikinudexi.pdf
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16080f76fda0e0---15268634236.pdf
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160971c2a17cfe---mirowutazawejofozito.pdf
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/6t9ac6kb89qe7te52cittnuruu/6605853858.pdf
    • http://teusz.pl/UserFiles/file/1972085489.pdf
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4f4f280816---megubudikuwurezonifowe.pdf
    • http://www.radiooro.com.mx/media/images/uploads/files/13565683444.pdf
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4f16e5c736---98872034153.pdf
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/b938abb6b42057011ee0833ecab02544/72125841974.pdf
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/b9c1fdbc299525a34642f50ebe65ac9d/2926873748.pdf
    • https://maychieuvinh.vn/upload/files/26415650737.pdf
    • http://mizuho-co.net/file/ck/files/12583203132.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/340b792336b64c0746cd91a6c04b65b1/kumat.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=is+ice+melting+an+exothermic+reaction
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c1dc.bin
f2991a470715481d5af93fb20b105a4eddc3295b60e38e018f26325193f7f474
pdf-font-stream PDF embedded font (sfnt) at offset 0xC1DC 10728 bytes
font_01_sfnt_off0000da55.bin
bfc7ce51a1a9b37382af61f0075eb0cdb972126da031002d338643432d80e6e4
pdf-font-stream PDF embedded font (sfnt) at offset 0xDA55 16252 bytes
font_02_sfnt_off0000f031.bin
294c1cc6644203cf70ab79746388ecc757e63dc5aec3674e7e09381887ae6499
pdf-font-stream PDF embedded font (sfnt) at offset 0xF031 15936 bytes
font_03_sfnt_off0001190a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1190A 16792 bytes