Malicious PDF — malware analysis report

Static analysis result for SHA-256 95dd77eabd92d429…

MALICIOUS

PDF

81.8 KB Created: 2021-09-14 18:00:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 968b9541b04a014261fa640531ed7f2e SHA-1: b892acf159ffbce55e2900c18e21722c49a11dec SHA-256: 95dd77eabd92d4291e753040838117f104e1d2888af44a004cc717c0ddc6feb8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to distributing further payloads or conducting phishing operations. No scripts were extracted, but the overall structure and URL analysis point to a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://synerhu.ru/uplcv?utm_term=voice+recording+for+android PDF link annotation
    • https://livres-arts.com/ckfinder/userfiles/files/36020583932.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/b3404cd8a13493ec4530db942692bdce/31710368885.pdfIn PDF document text
    • http://geonatlife.es/ckfinder/userfiles/files/funazipukaloro.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/f9209406ca0848f2ad17ddcb81dce5ff/95483793916.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/6f0205858cd41b57f7642797b61f29ae/6412062246.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c048945062---lirekonaleguw.pdfIn PDF document text
    • http://aburobocon2019.mnb.mn/uploads/files/rizigarumibidokiputi.pdfIn PDF document text
    • http://aptekarynek.pl/zdjecia/fck/file/59381770553.pdfIn PDF document text
    • http://poliinc.com/upload/files/zawuziguba.pdfIn PDF document text
    • http://farmaciafoglia.eu/userfiles/files/39020367311.pdfIn PDF document text
    • http://poketomecam.com/uploads/files/pesafediwej.pdfIn PDF document text
    • http://nextlab-semi.com/files/fckeditor/file/fixalutipunexevagigafun.pdfIn PDF document text
    • https://wodepcb.cn/uploadfiles/files/50616368761.pdfIn PDF document text
    • https://chmelo.hu/sites/default/files/file/ginaferelagapu.pdfIn PDF document text
    • http://www.wiz-fac.com/uploadImg/file/32577490352.pdfIn PDF document text
    • https://consurs.ro/ckfinder/userfiles/files/tudagojazuri.pdfIn PDF document text
    • http://xn--12cmi2byac9cdhd0hra6d7bxkwbgj1gch.com/user_img/files/432484739.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/369ca0a32d0b7a14f0b31264f8807aa0/derokoviradilakeralisuzu.pdfIn PDF document text
    • https://mrdak.cc/uploadfile/files/gadugosilux.pdfIn PDF document text
    • http://closehorses.com/userfiles/file/wonemokugiveninozixeg.pdfIn PDF document text
    • http://cabanagarden.hu/editor_up/74030397275.pdfIn PDF document text
    • http://izumrud38.com/ckfinder/userfiles/files/melawoputatikedexexa.pdfIn PDF document text
    • http://shqinze.net/admin/upimg/file///55207150675.pdfIn PDF document text
    • https://mb-classic-service.de/userfiles/file/bilufumomijuzeki.pdfIn PDF document text
    • https://ww150002.linebot.net/upfile/files/20210904211556.pdfIn PDF document text
    • http://spl-designs.com/ckfinder/userfiles/files/bilib.pdfIn PDF document text
    • 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_off0000dd1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD1A 10308 bytes
SHA-256: 4039ee98dd867205e2ab9b75e2a0391fb6b2dc224f2cdb294215f1cf65263641
font_01_sfnt_off0000f438.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF438 17364 bytes
SHA-256: f6cf4d925ae88eb3bdf05a7c3a56453fea7776a0d29d3f87d2baa49f033400ea
font_02_sfnt_off0001212d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1212D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.