Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e7034555c95bc08…

MALICIOUS

PDF

85.2 KB Created: 2021-09-02 17:01:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 66c86095d34d14f8afbdcdd684ec2933 SHA-1: bdebb74d3eb219abcbab57461166af307fd57453 SHA-256: 2e7034555c95bc082e84932897b32eb41aa4597a40bd9455e7eaa8f087e79bb2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, embedding numerous URLs that point to compromised CMS upload storage and disposable hosting. These links are likely used to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://oniceh.ru/uplcv?utm_term=organs+of+ecowas+pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c157dca1e61---65134761142.pdf
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/d68305e4fce76eefa59b7ce5ab595133/kodonibepepagafibalarag.pdf
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b5e1e350c8c---zujabubeninorekoda.pdf
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c1ef7df50c---basiserukatelonivijajav.pdf
    • https://siroyensao.com/upload/files/fojibubo.pdf
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/26649089708d14d6deeb0105f6e7c17b/bokafewolaworogarusovusiw.pdf
    • http://seoulsquare.com/userfiles/file/wonuvirabajexorojomagas.pdf
    • http://thepdaitruongphat.com/upload/ck/files/gawesesulukimib.pdf
    • https://abbma.in/admin/uploads/file/18666526984.pdf
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/sebikafo.pdf
    • http://calisnt.com/uploads/files/ruvosusulosobibefifigega.pdf
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/odp6s4rktocn48s24ssuh8cpsg/tiniwatine.pdf
    • https://ego-sofa.tw/uploads/files/202108250854356298.pdf
    • https://topupdana.com/contents//files/52800196297.pdf
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/6fb82a147a5e43d39ada684d3f2192e5/tuxetitu.pdf
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085b6e4c77f1---jurukuwubitesomi.pdf
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/db2af853bf661f8db21d6ec875c2e57b/41502830944.pdf
    • http://mellorymotors.ru/admin/ckfinder/userfiles/files/48430894897.pdf
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed16434081---galaxudajubekeb.pdf
    • http://www.jfac.kr/ckfinder/userfiles/files/ronofirewobimisibaba.pdf
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ab3b3c7558a---72785147551.pdf
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/8f5890883682a26f9f14460b57a7f464/siligik.pdf
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072bc4843af8---nigelovawa.pdf
    • https://tempatpasang.com/contents//files/45443276767.pdf
    • 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_off0000e83c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE83C 16792 bytes
font_01_sfnt_off0001004e.bin
0ff070f1bb051aec6c4b35e8ac01785330a5dfa4307b1ce8704b21c69bcc5edb
pdf-font-stream PDF embedded font (sfnt) at offset 0x1004E 17864 bytes
font_02_sfnt_off00012f22.bin
d05951d64d183e6ae8080fabb505913fce1d572a70c2e5a2a79cf9e0bf8a0fc4
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F22 10668 bytes