Malicious PDF — malware analysis report

Static analysis result for SHA-256 3802276ff3ac97a8…

MALICIOUS

PDF

85.6 KB Created: 2021-09-07 23:36:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 6d14e285a539869ab6ebfe2b9ef917b9 SHA-1: 095a027d611d4c3117c18541976726af5f7e6df8 SHA-256: 3802276ff3ac97a89c4662973054386003bd3420b3a4cb31398a313c02216274
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS uploads or disposable domains, suggesting a link farm for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://pistant.ru/uplcv?utm_term=personal+computer+configuration+pdf PDF link annotation
    • http://parejalecaros.com/adjunto/upload/fck/files/30691412118.pdfIn PDF document text
    • http://gibisch.com/files/files/89192447973.pdfIn PDF document text
    • https://stcatherine.ac.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160fbacab9993d---bafezafajikozesonor.pdfIn PDF document text
    • http://incomsistema.ru/ckfinder/userfiles/files/kedexugulopatalojanituruz.pdfIn PDF document text
    • http://jerseybankruptcylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jofifukobe.pdfIn PDF document text
    • http://moestuinwebshop.nl/userfiles/file/93433865168.pdfIn PDF document text
    • http://abwlargo.com/uploads/files/posusajovazot.pdfIn PDF document text
    • http://archetipoingegneria.it/userfiles/files/vilogaruziwasegizil.pdfIn PDF document text
    • http://atreve.eu/ubezpiecz/obrazy/file/87148385444.pdfIn PDF document text
    • http://goodwill.pl/userfiles/file/natumuwawujufabefo.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608684ce223f4---boporedamoduzo.pdfIn PDF document text
    • http://anvlaw.com/userfiles/file/fudupakukidavixurubaga.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608d03371a2c2---biwodipukafumitinevuwep.pdfIn PDF document text
    • http://misterholidaysanprisco.it/userfiles/files/52707460543.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a3de10587dc---95134687893.pdfIn PDF document text
    • http://vivaldiskibus.com/FileData/ckfinder/files/20210904_977FEBF125227CA8.pdfIn PDF document text
    • https://diedacorporation.net/freesiafiles/file/65894517418.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/b0nurvhmhqiv0dbe7rv6ra0rup/denorakenavuwesupesaxoke.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ec62ac844b---ruziwugixilamuluvuxalupuk.pdfIn PDF document text
    • http://henca.com/files/details/file/gejinurijatuwib.pdfIn PDF document text
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/dmepgsjcbhkuph93dfvmr5ufpo/rukiredidikabexekoka.pdfIn PDF document text
    • http://vswet.ru/f/wijisopenenizutuwut.pdfIn PDF document text
    • http://www.dr.schure.net/ckfinder/userfiles/files/56196927518.pdfIn PDF document text
    • https://alzubidi.com/userfiles/files/87075929054.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_off0000eaee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAEE 11064 bytes
SHA-256: 14f59aa5266902eef840abd9020a6d891f9a29aec984cc1ba3df0c080de8cdf3
font_01_sfnt_off00010486.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10486 17136 bytes
SHA-256: 0cdc164ee100a671a4a5822f5b4a4b7db85c862590b1bc82eeb5df6dad1f70f7
font_02_sfnt_off00013064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13064 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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