Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e478fb6ed97d9fe…

MALICIOUS

PDF

207.8 KB Created: 2021-06-27 17:35:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a46907813d2f2707a5039058533572aa SHA-1: 5b221114f2faa1fb3b6ab689c75542b181cfd321 SHA-256: 5e478fb6ed97d9fecfc2a3b2aca3f748ad51346e607fa2eaa311b47046e2993e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to compromised WordPress sites, specifically targeting file upload functionalities. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to malicious content hosted on these compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

Heuristics 5

  • 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.
  • 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://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad5e303805---78260126875.pdf
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d7a304798f3---jejadebefakenixuxenosaxut.pdf
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/sqoqbovc06heig2b07nhpp52e5/keban.pdf
    • http://chiangmai-clean.com/user_img/files/rakutafo.pdf
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/6f65ae0ee2aec2e9da9f2303f87873a3/10339162170.pdf
    • http://jarosi.hu/files/file/felizolomevufoneteka.pdf
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/aa62892c57850960b24b1c66a52a4e6b/kowifibikiwasutomemefuwa.pdf
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c2cfbc180b6---3247123564.pdf
    • https://cottonweb.net/userfiles/file/mudameroxab.pdf
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/oeqrejq8d3iv42h78tu5necnm6/56366006794.pdf
    • http://guides2alpes.fr/uploads/file/nonurukefep.pdf
    • https://moolans.com/uploads/files/batobasojupimapekemu.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adbf3373245---juzesodikaduxiwatove.pdf
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160858b81a901c---fadobozatusi.pdf
    • https://energooptima.hu/upload/File/lotokumale.pdf
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a9a6dda7e3d---55580306467.pdf
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/f171c51e41fc7ab23ab57031aa2a094b/74432503232.pdf
    • https://aduanaldelvalle.com/userfiles/file/85198568367.pdf
    • http://grandchainfamilyfoundation.com/clients/85333/File/31254230800.pdf
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b43ad5595e0---67622246826.pdf
    • http://aldo-ins.com/userfiles/file/lifideje.pdf
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/e2f8dac33d11f42553f932ae5f8e5644/39236078665.pdf
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/4c9d0d4c9ff474075072746a34f52e43/97707896734.pdf
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//20295915897.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=what+is+my+relationship+to+my+cousin%27s+child
    • 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_off0002ce8c.bin
ffc12f5626a49eda12321cbe37f935dac6f99d62fcf6f97714ce6b106a240876
pdf-font-stream PDF embedded font (sfnt) at offset 0x2CE8C 18600 bytes
font_01_sfnt_off0002ff40.bin
4b14a27ac0978a6f1ec7fa01c1eb9b750da5bc27cf806b40db0b9c233dd31d83
pdf-font-stream PDF embedded font (sfnt) at offset 0x2FF40 11020 bytes
font_02_sfnt_off000318c2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x318C2 16792 bytes