Malicious PDF — malware analysis report

Static analysis result for SHA-256 567b661c28d74d5f…

MALICIOUS

PDF

86.6 KB Created: 2021-08-25 00:29:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 0bb1498d6ec2feb58d346e51ade80a6c SHA-1: 8bdc090fbe8b817ab566d36629a08fcb871a1d1b SHA-256: 567b661c28d74d5ff179aa83392c452fad3eebd896b3c00ddbb5694668105719
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that function as a link farm, directing users to potentially malicious sites. Heuristics indicate these links are often hosted on compromised CMS uploads or disposable hosting, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://laborke.ru/uplcv?utm_term=chick+and+chips PDF link annotation
    • http://sashtraayurveda.com/ckfinder/userfiles/files/bigavibipudifanudaz.pdfIn PDF document text
    • http://krakow4you.pl/krakow/files/gakilonuwulusu.pdfIn PDF document text
    • https://kvkumariajnkvv.org/singhania/downloads/file/24270907872.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/wodifabel.pdfIn PDF document text
    • https://bluetact.com/locktactyuma/userfiles/file/zutubeluwisu.pdfIn PDF document text
    • http://thomasbelldescendants.com/clients/40432/File/77279156541.pdfIn PDF document text
    • https://www.meditech.cz/ckfinder/userfiles/files/lesazufoxuwumumum.pdfIn PDF document text
    • http://3dprofi.net/images/uploads/file/7573586768.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16104ca32b6ae1---kiwowilusa.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607769100700a---silifikaveladipelavobes.pdfIn PDF document text
    • http://tucholainfo.pl/userfiles/file/17963252775.pdfIn PDF document text
    • http://ketoanaca.com/uploads/image/files/venexegovidakipanonusuro.pdfIn PDF document text
    • http://www.injamal.es/nueva/ckfinder/userfiles/files/96900843436.pdfIn PDF document text
    • https://lesfeesdelhetre.fr/upload/files/dizisujifotuvepenig.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a4aa59ec591---wewizi.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/16074ca98f26e0---gatagipefize.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/30jc8tt6708q27p8reqp77k290/fuleg.pdfIn PDF document text
    • https://smilepaper.tw/archive/upload/files/nokuravibuzurifutitabu.pdfIn PDF document text
    • http://www.amanuttarakhand.org/ckfinder/userfiles/files/17334659725.pdfIn PDF document text
    • https://bilalyapidekorasyon.com/userfiles/file/somiwanimuzeduvufetil.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aca7912e194---fixofofekofupuso.pdfIn PDF document text
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/520ca2a47b812acbae14fe5ef3dc0490/72069230296.pdfIn PDF document text
    • http://royalwedding.jp/images/blog//file/69138872247.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1607c84787b42c---87352131178.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_off0000eb27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB27 19072 bytes
SHA-256: f6ba3c3a0a264abf2609dcb4d5edf551b5aabe27b6477b4e349cce066c3edb94
font_01_sfnt_off00011ba7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BA7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000133be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133BE 10240 bytes
SHA-256: 32ea0cbb50189ef4175b4361500570256d5990fcf2daa75ba641d7643051b5ca

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