Malicious PDF — malware analysis report

Static analysis result for SHA-256 251174f64ce736f3…

MALICIOUS

PDF

83.0 KB Created: 2021-09-07 12:58:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: a78f45ef7a9be9c902c1b8ff7c7840cc SHA-1: fd4b55c432ded5b61e808896a5274731b78ea5bc SHA-256: 251174f64ce736f32b317d01983145f62a7be4dd1f1e99d6f16973054cdc067f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs that point to compromised WordPress sites and other disposable hosting. These links are likely intended to redirect users to malicious websites for phishing or to download further malware. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://inwebjor.ru/uplcv?utm_term=gear+fit+e+manual+portugues PDF link annotation
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e094ee64f42---xebakujilabanitu.pdfIn PDF document text
    • https://peterdegendt.be/file/buwodijujavumonogagejag.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16092e86b6b2c0---gifirugugajokalivimuvala.pdfIn PDF document text
    • http://posekatzahradu.cz/files/file/fojosevuv.pdfIn PDF document text
    • https://msr-hudsonproperties.com/wp-content/plugins/super-forms/uploads/php/files/29ac1485fd773fd4b87722ba8bf00186/73713674200.pdfIn PDF document text
    • http://yejiya.com/userfiles/file/zupokabena.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094d8c7f3744---lajuforopogi.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/edfe071ff2b6ef91b3568106e208b33f/52007701748.pdfIn PDF document text
    • https://elektrona.cz/files/file/66078560941.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609f604718062---saliwibafezej.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/68c778vda2krpou777q21mf022/xenuvoduxevuxobalug.pdfIn PDF document text
    • http://aj-logistics.com/stock/userfiles/file/5806620685.pdfIn PDF document text
    • http://harposwebdesign.nl/app/webroot/files/userfiles/files/dubesonarusomubu.pdfIn PDF document text
    • https://sedefartphotography.com/resimler/files/fesutezevusomu.pdfIn PDF document text
    • http://agro-pasz.pl/ckfinder/userfiles/files/rewojebusewuwudedogafe.pdfIn PDF document text
    • https://caribemed.com/userfiles/file/tedipitomabawub.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160822fc0edb4b---pubuvasumaxorufegonebef.pdfIn PDF document text
    • http://agisinfo.ru/uploads/content/files/20144852239.pdfIn PDF document text
    • http://ducthanhtam.com/uploads/userfiles/file/budolapig.pdfIn PDF document text
    • https://synodradomski.pl/userfiles/file/surofovilifezikeso.pdfIn PDF document text
    • http://goldnumber.info/userfiles/file/16373315414.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160aa6b9569290---7827284440.pdfIn PDF document text
    • https://okud-istra.hr/userfiles/file/27344416758.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/6884f0b31315d51152e3e84d95959f87/53091555742.pdfIn PDF document text
    • https://wolfgang-photography.com/userfiles/files/kuwawuwatenidoxiborikajum.pdfIn PDF document text
    • http://change4best.ru/upload/file/vupitoseranatawi.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_off0000d77d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD77D 10840 bytes
SHA-256: d4d93ae950265cd333d32d0b937208dd6a19ca79e490f3b51124e313655def21
font_01_sfnt_off0000f078.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF078 20444 bytes
SHA-256: cbedfd4979712dcf4bd81183e6812e1413c46ad5cbd6214021035a563fa6df9f
font_02_sfnt_off00012661.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12661 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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