Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a7459cb6a4362bc…

MALICIOUS

PDF

84.5 KB Created: 2021-07-02 20:43:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e631502be8e663b5e6bcea9cf63ed8b5 SHA-1: d28830504d85487bf6b85fd07489c434cdd101df SHA-256: 0a7459cb6a4362bce2be277de8437a5cbeb8c397ee4486211a0b47c607c9aa21
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to numerous URLs, many hosted on compromised CMS uploads and disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607796d165c02---82941203434.pdf
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3d3cc0d59e---junejiwafijikojorijowaxe.pdf
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/1609fed6191bde---96990260717.pdf
    • http://conomiya.com/images/uploadedimages/file/nokir.pdf
    • http://globalbando.com/DATA/upload/files/202106211005167635.pdf
    • https://bouveau-consulting.com/userfiles/file/63640910799.pdf
    • http://aarogyamedico.com/userfiles/file/1641221060.pdf
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1608ec9c530240---14885858753.pdf
    • http://museodegliarazzimarsala.com/userfiles/files/xivamuliwesen.pdf
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfcf3869aec---23632861358.pdf
    • http://orgue-chantepie.info/FCKeditor/upload/file/53074060316.pdf
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f5d085a3b5---50300517084.pdf
    • http://timnhanhonline.vn/upload/files/69277819106.pdf
    • https://aawyx.com/sites/default/imageuser/file/dabuge.pdf
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/2c72om4ksj1jjvsccjff35ehro/punoxufawopibalago.pdf
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/e968ac131b2bd0be9d6031f7b620f037/teladizozebutanofikawut.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac5a39c5bd6.pdf
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607782c571b7e---zadunifogerijanevejoku.pdf
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/a18191f5a1cd395b5c1fbee7b9eea3c3/13635693396.pdf
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/8ffedbb60153497d01a16e01ffdd40d0/gekib.pdf
    • https://sca-kc.com/scauserfiles/files/lexoli.pdf
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608dc00d3f3a1---5917714637.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=tuning+a+violin+for+beginners
    • 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_off0000ea89.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA89 16792 bytes
font_01_sfnt_off000102a0.bin
3ac19b2e36cc4cd91d77f1c042713fb7f98ea2b8e4541d15920e9ee5e01ff011
pdf-font-stream PDF embedded font (sfnt) at offset 0x102A0 10560 bytes
font_02_sfnt_off00011acf.bin
168d6182d4067cfedd673522a44a9e9afedc80657ca3201f6d637771fc12847c
pdf-font-stream PDF embedded font (sfnt) at offset 0x11ACF 16332 bytes