Malicious PDF — malware analysis report

Static analysis result for SHA-256 9171466da895ca8c…

MALICIOUS

PDF

80.9 KB Created: 2021-06-30 16:33:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ccaa7f5f0228d8cc04cdd0408a36225d SHA-1: 6f9fedd1ef316c9dcdc37bac3d62e10b7a5b0b2f SHA-256: 9171466da895ca8c4647fd153464edef5990f497ce794fce66ed83c0603272a4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to potentially compromised websites, many hosted on disposable domains or using WordPress upload vulnerabilities, suggesting a link farm designed to redirect users. The presence of external URIs and the overall structure indicate an attempt to lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/1q961cu1chkeg8lf1mkvfbipqu/fosegakogupobizi.pdf
    • https://lapalettedesarts.fr/gestion/file/fitepuvifuzawuwo.pdf
    • http://vivatbacchus.hu/files/file/kusefusuletatolanedeno.pdf
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608d5c1d050df---81744845777.pdf
    • http://amon-syotengai.com/userfiles/file/sonerugarotevediz.pdf
    • http://criminisiepartners.it/userfiles/files/vinudolurodewukekovarax.pdf
    • https://lacaune.hu/userfiles/file/sudinupenuwig.pdf
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0a042ec4f---zalowuxilunalufa.pdf
    • http://tablica-nieruchomosci.pl/uploades/fckeditorfile/55883374525.pdf
    • http://bayzones.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/89845376181.pdf
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/3630037091.pdf
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16080111224a1d---gobox.pdf
    • http://teifsepahan.com/files/file/kulejiwijilizixelas.pdf
    • http://orrizon.ru/images/file/61695620292.pdf
    • http://www.alex-vasilkov.ru/images/wisdom/file/gexuzixanoduzadexe.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608471ee0efd0---21251364321.pdf
    • http://andrelandberg.com/userfiles/file/75160488642.pdf
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/fd0cb7087fabf3be2e28399766f3b304/ruvivakituronomatebuwakap.pdf
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/df2e8b756497f025b5ab513f0ec2b9fa/sokuwokedo.pdf
    • https://ludifrance.fr/userfiles/file/gebaramogumira.pdf
    • http://universalestetic.com/userfiles/file/lagijuwoxifiw.pdf
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609417fc0b91a---43862596129.pdf
    • http://refta-bg.com/userfiles/file/58397123270.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=swords+and+sandals+2+download+full+game
    • 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_off0000d5a0.bin
1b6455587605c7c4921ac2da82ea001a427c4976996f3651bae12c5279d09de2
pdf-font-stream PDF embedded font (sfnt) at offset 0xD5A0 10888 bytes
font_01_sfnt_off0000eeb3.bin
43528c4d78bc3414565ada46d0256d52674d0edc9796351c1e376c89278d8f67
pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB3 17352 bytes
font_02_sfnt_off00011c33.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C33 16792 bytes