Malicious PDF — malware analysis report

Static analysis result for SHA-256 064a1e152381d922…

MALICIOUS

PDF

75.6 KB Created: 2021-09-08 05:50:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 82cd395d85fed5a28d696ab817e120c3 SHA-1: 47321607b0c69c31599f07ac348050e9000a367f SHA-256: 064a1e152381d9229dc0c6ac867d0b8c7b0e1e470067a663bc3d254c24042dbf
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate the document functions as a link farm, directing users to multiple unknown or potentially compromised websites. The presence of numerous links on disposable hosting and compromised CMS uploads suggests an attempt to distribute malicious content or conduct phishing operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://radmangroup-ye.com/rgfiles/file/79150115008.pdf In PDF document text
    • http://benly-carson.com/product/files/lexekuser.pdfIn PDF document text
    • https://etonbio.com/newsLetters/images/file/71700801314.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/33766559459.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/bb8a0be873d5bd0fc86fa85f214441aa/gogoxajakanavulomapagegu.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160857b43210a3---lemezabezefagivora.pdfIn PDF document text
    • http://ghalemdi.com/userfiles/file/jomujagotelip.pdfIn PDF document text
    • http://rkmaster.ru/uploads/files/paperugizusavozobexuf.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606f41c686311---rifabaxajidox.pdfIn PDF document text
    • http://mexvp.com/ckfinder/userfiles/files/14793579371.pdfIn PDF document text
    • http://ramz-alqassim.com/Files/files/xuserepegug.pdfIn PDF document text
    • http://marinaxaraes.com.br/ckfinder/userfiles/files/5113512711.pdfIn PDF document text
    • http://www.terresdescaraibes.fr/file/37855139674.pdfIn PDF document text
    • https://pankajplast.com/ckfinder/userfiles/files/7577175654.pdfIn PDF document text
    • https://cape-electronics.com/media/file/zovelonewo.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/qma5hpuav82piirik691bfc5f6/mijizutigu.pdfIn PDF document text
    • http://hum-lucknow.org/test/fckeditor/file/31236512551.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/54076363017.pdfIn PDF document text
    • http://zangerlelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/61617678972.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/2b29d653c310d75086614388b44c8eb6/peboze.pdfIn PDF document text
    • http://moda-minulosti.cz/docs/momin/file/pavajatamazejuz.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec41d97b76c---89303532891.pdfIn PDF document text
    • https://tatsolarlight.com/uploads/files/lukisemib.pdfIn PDF document text
    • http://muszempilla.com/files/file/38687188095.pdfIn PDF document text
    • http://chi-kara.net/Upload/files/virovatekusirilusesasu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=gillette+fusion+5+proglide+manual+blades+8pkPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c0af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0AF 17136 bytes
SHA-256: 7eb70463999e5f88b789795bbc1797658b4a67818e0e3b7149983433875421f4
font_01_sfnt_off0000ed9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9D 11556 bytes
SHA-256: 426d1aa31c39c7ef997a393cc6a05d444e22882ea8f22a2e9ec9c4e1c8048ffa
font_02_sfnt_off000108a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108A0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1