Malicious PDF — malware analysis report

Static analysis result for SHA-256 02460df3c76a91c6…

MALICIOUS

PDF

75.4 KB Created: 2021-09-13 19:04:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 466394f0784c29f9978279c8c5db6602 SHA-1: 9f0460f6bcefbd215ff25f1440547d417a9ea1fb SHA-256: 02460df3c76a91c6a7069646ae6b86937b3a9353a2cbe37ddca9c2ab8782d54d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of links, many of which point to compromised WordPress uploads or disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://bctlorraine.org/userfiles/file/42922926198.pdf In PDF document text
    • http://mea-travel.pl/userfiles/file/jupabetanuj.pdfIn PDF document text
    • https://suruburi.net/mm/file/50435165361.pdfIn PDF document text
    • https://fanaf.com/article_ressources/file/powovanafekimogifuginanu.pdfIn PDF document text
    • http://sllight.ru/design/img/upload/file/bupuzojagi.pdfIn PDF document text
    • http://verzorgingsindex.nl/images/uploads/wifezefu.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161377338c63c6---58761683381.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/9b6306630360533cdcbd62772fdb2f34/9338248925.pdfIn PDF document text
    • http://riph.pl/userfiles/file/61918015438.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/5788df9384500e0080ea9b518d22f2d3/patizupuxe.pdfIn PDF document text
    • http://taxfreepoint.com/file/pidazopomoriwap.pdfIn PDF document text
    • https://holcom-solar.com/webroot/img/files/5413885674.pdfIn PDF document text
    • https://mayphoviet.com/media/ftp/file/40885910772.pdfIn PDF document text
    • http://55pluscommunityspecialist.com/userfiles/files/befeleku.pdfIn PDF document text
    • http://dayuntang.com/assets/uploads/ckedit/files/20210903002259.pdfIn PDF document text
    • https://sydneystudytour.com/accounting/userfiles/file/9937050944.pdfIn PDF document text
    • https://actorconseil.com/files/file/88675483727.pdfIn PDF document text
    • http://fluitec.fr/ressource/site-image/files/lazapesekotuse.pdfIn PDF document text
    • https://kakakmanis.com/contents/files/71126134094.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/26495e2786c5f40921d91a5049fbb0a7/samefun.pdfIn PDF document text
    • https://stephan-kratt.de/data/reiterhof/userfiles/file/mupifokalosu.pdfIn PDF document text
    • https://ylwlgwadmin.ylwl.cn/upload/files/wusakijetunef.pdfIn PDF document text
    • http://otoozevran.com/resimler/files/vusifajesife.pdfIn PDF document text
    • https://hotnews.md/upload/userfiles/files/76072279320.pdfIn PDF document text
    • http://aybar-gallery.com/userfiles/files/46974079456.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=rotate+lock+screen+androidPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c2bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2BC 17660 bytes
SHA-256: 7eba936d8c1d53ebc715ed86a8a08b75d4c2fe6c33248aa114b42adc773e61cd
font_01_sfnt_off0000f04f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF04F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010866.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10866 10500 bytes
SHA-256: 341c9d2ecad2d00ccfcd5cd32c4bbffcf7e6677b806ebbe4cb195f024864f21e