Malicious PDF — malware analysis report

Static analysis result for SHA-256 90d6d8450ff8ccbe…

MALICIOUS

PDF

90.0 KB Created: 2021-06-27 16:28:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e51349cd93cba75b1491d261f0fc9434 SHA-1: df41a76c38a40718697dab807372a13e660d5187 SHA-256: 90d6d8450ff8ccbe14806d7a76a8d89b65586ca0aa457dfaed10ac61a1ce49a9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous links to external websites, many of which are hosted on compromised WordPress installations or appear to be part of a link farm designed to redirect users to malicious content. The presence of these links suggests the document's primary purpose is to direct users to potentially harmful sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://queure.ru/uplcv?utm_term=carbohydrates+can+be
    • http://pleasanthillpchurch.com/clients/5/55/55aa087cacc886b2254ddcc242c0699b/File/57571653590.pdf
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607d8be554e3e---48014432691.pdf
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/160b71ec087240---wabuw.pdf
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/20925547f0233cbbfcd7701c16d64be7/fonufusurevedijixo.pdf
    • http://wskinbody.com/data/boardData/files/55515185841.pdf
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608fbf72bfc42---92818988653.pdf
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b298668238---1283282099.pdf
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/7qa05bts1fmah02lmibksiv4r2/zoguviluziz.pdf
    • http://huiking.cn/uploads/file/270109466359.pdf
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c71ee42ed9e---20071913170.pdf
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a19299441b---1746198852.pdf
    • https://amrapalispot.com/userfiles/file/12921472111.pdf
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607117b9d0b49---92830941022.pdf
    • http://lyshiying.com/d/files/sagikulalasitume.pdf
    • http://wisewood50th.com/clients/3/35/35ca2b70ae131fa39667c240906a3fe4/File/puvobomedab.pdf
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/acb1e748bb04e56ffed29784d0cc28c1/31916809045.pdf
    • https://faprosid.com/file/lirudojirosunoxew.pdf
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c683ca08ec0---97354404458.pdf
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/54d1c471ee5c7cf126c66918fdc932bc/27155908484.pdf
    • https://pousadamarazul.tur.br/wp-content/plugins/formcraft/file-upload/server/content/files/160972443cae02---nipitatur.pdf
    • http://goldartline.ua/userfiles/file/binitudiwavusakogazudowa.pdf
    • http://eltonltd.ru/sites/default/files/uploads/fefupokarodu.pdf
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a18a81a162---xatewilu.pdf
    • http://remaining-mc.de/userfiles/file/17324814751.pdf
    • http://parentini.it/userfiles/files/64998113108.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_off0000fcc6.bin
6ea4827e38f2849238d99d67663a93251a55cb0b5b0593606a6671921f917bc6
pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC6 17384 bytes
font_01_sfnt_off00012a79.bin
c712f71493b4c1e81535104a578f2e735ba32d5ca2e029bd23406886bd2edab8
pdf-font-stream PDF embedded font (sfnt) at offset 0x12A79 10612 bytes
font_02_sfnt_off000142c4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x142C4 16792 bytes