Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e22f4b347b9aa17…

MALICIOUS

PDF

87.0 KB Created: 2021-08-17 20:31:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6be6c24eec03bfbdd394c36d9d61217f SHA-1: 8c1e1b0a015f5de50b8aca0a52847706228fbfa3 SHA-256: 3e22f4b347b9aa17c0e33de00fdba3d339994f819cef8b1d200654b8644dd132
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and link farms, with several pointing to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://huntic.ru/uplcv?utm_term=teoria+de+la+motivaci%C3%B3n+humana+de+abraham+maslow+pdf
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160900fcb7910c---84784115723.pdf
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/s6k2l3vq2kng9gv7cr4nf9m00s/52276724522.pdf
    • http://allasclub.com/campannas/file/tosawirerorigesovituzono.pdf
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ffd035578e4---65387125159.pdf
    • http://asianmosaicnyc.com/userfiles/file/sodonoranawovirajisomex.pdf
    • http://sheeld.org/clients/d/d0/d021426cee8527c21a172be12ef3d645/File/gijovupiwoxotewe.pdf
    • https://textolinguisticsolutions.com/upload/editor/file/pidejotodoketomerepofo.pdf
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/rppikbtafo8idvhef6nh1flo1n/xovevora.pdf
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160779e1235a6a---28725017306.pdf
    • https://mujeresenmovimientoplus.com/userfiles/file/57668755471.pdf
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/291875bb8e29a5414b428dff42c196e9/sisinuvebajeniluvozapa.pdf
    • https://samudra99.com/contents//files/bedavatukitudikagofe.pdf
    • https://matrainagycsalados.hu/userfiles/file/toboj.pdf
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/5psp40ggemo18rm92u856220at/28058837349.pdf
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1607bbbc2a9561---15562066479.pdf
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/82h9i1hq1igghlko5q87u6h78k/jovovikuv.pdf
    • https://cherrychile.cl/cherry/uploads/contenido/files/mekozanidowajonar.pdf
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/16080ca14061f1---winulokuwiwamim.pdf
    • http://yfatc.com/userfiles/file/mowarerika.pdf
    • https://perfecthospitals.org/FCKeditor/file/35996247064.pdf
    • http://dailymaytrogiang.com/userfiles/files/lumore.pdf
    • http://4bzsoftware.com/Images_upload/files/26442784270.pdf
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c98be35cb40---92970044086.pdf
    • https://eitmedu.in/ckfinder/userfiles/files/25557043501.pdf
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/fdhlsaenlkt48lnfngh7t24imi/xidowijatujito.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_off0000eb9f.bin
658a0073ac079584243f47ae5b90405973bd62961e87f81a5a59ee6b348d607e
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB9F 17520 bytes
font_01_sfnt_off00011854.bin
0af7681a93daff698341dd772a637fae51988e55d1445ff4f0cebdc3fcb91537
pdf-font-stream PDF embedded font (sfnt) at offset 0x11854 11376 bytes
font_02_sfnt_off00013285.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x13285 16792 bytes