Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e192dc29821b9b6…

MALICIOUS

PDF

89.4 KB Created: 2021-06-28 00:00:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fa9e930e5e490b202c627c653bf00f5f SHA-1: d3a613a86da30d061f9f98c2687a6c40bd4a7828 SHA-256: 9e192dc29821b9b6a1ef35817e5b596215ffea14304b3540a6515b345e620f5c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to compromised WordPress sites, indicating it functions as a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://catamma.ru/uplcv?utm_term=best+thing+to+say+when+asked+what+are+your+weaknesses
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c45980636b8---66180267990.pdf
    • https://luminex.pl/upload/file/78308680067.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/rsvm9a94frpp0l7u43nl87o4t3/23137626808.pdf
    • https://finances-canada.com/wp-content/plugins/super-forms/uploads/php/files/ffd956d794df246ec89f89a04de588b4/39901080565.pdf
    • http://koryosushi.com/uploads/files/mukojifariwoxik.pdf
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/04f6c7a848e29af1e2b2d977484ee9f8/dizugukojelot.pdf
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607d878683393---66449093821.pdf
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/1ei69108eqi5gpr0m0jlchbk45/zofebakesixorabetesixeg.pdf
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/31d14ffbae866fedff3e293efc34e865/labafireponake.pdf
    • https://audit-advisers.com/userfiles/file/21039044591.pdf
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607187ae9e569---77029410764.pdf
    • http://cdmatik.com/uploads/file/vinorizitugi.pdf
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607e429bca8e8---gobidobape.pdf
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/fbd798920fdebab67605c3cfed659095/xafukaf.pdf
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e700991ee9---64490668563.pdf
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/deatdgqd4amp069m1joh0nanvg/vazoputonomusubola.pdf
    • http://eltonltd.ru/sites/default/files/uploads/69143891805.pdf
    • http://aydinservis.com/ckfinder/userfiles/files/luwotosovolenorajivefad.pdf
    • https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/daabbfdd7dc1a74447bd561f11135812/22123636364.pdf
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2408223145---65317056643.pdf
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/4513ab2cf3327e234104fc6268c91365/83197755976.pdf
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160838e33a8218---bojujesotuxawedubuz.pdf
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160808b5e402ce---zibajixopeximosigas.pdf
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/fd2eb239f43676ebf2b9c3caae65d17b/88205203160.pdf
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160b23054e0074---vipefuro.pdf
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/5b11251237704b6be772940695c10836/nuwuxuxe.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_off0000f74d.bin
9cf0fbfa95e45922226c66d86e314064905066c189ad09d9f24184f0fe557ea1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF74D 17924 bytes
font_01_sfnt_off0001268c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1268C 16792 bytes
font_02_sfnt_off00013ea3.bin
d250be9e87e11a435fe574b3600be6ee75bb1c6959eaf3e0b9fc3f3cc69f95dc
pdf-font-stream PDF embedded font (sfnt) at offset 0x13EA3 10928 bytes