Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2dff03457608eaa…

MALICIOUS

PDF

94.7 KB Created: 2021-07-30 15:09:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8e546d01bad5822e70881a9291dcc53d SHA-1: bc1cd4308bf148e6245c0d4f7ca78398dd7ceb65 SHA-256: f2dff03457608eaad0e159407f2bce00ae03319cb1c2f733756035c28cb90b91
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 WordPress installations, suggesting a link farm designed to distribute malicious content or facilitate phishing. The ML classifier and ClamAV detection strongly indicate malicious intent. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://wastran.ru/uplcv?utm_term=what+are+the+5+principles+of+nonverbal+communication PDF link annotation
    • http://flemingfamilies.org/clients/8/8a/8af36a28baf44bfc7b8a7004fb4eaede/File/vomokibesomeliroze.pdfIn PDF document text
    • https://zlatartopalovic.rs//files/47958779873.pdfIn PDF document text
    • http://essiac.cz/UserFiles/file/83897170645.pdfIn PDF document text
    • http://dajuicebarus.com/uploads/files/wimebazazogekopoxonareni.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a6aaed7e47---69684117663.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1811278788---sowiwunanazinesipavepoko.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/u84q4derh18dve6oc5f8rkvmai/33107707228.pdfIn PDF document text
    • http://unipsyclinic.com/userfiles/file/20210522075732.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160b9195e81e37---74113939463.pdfIn PDF document text
    • http://cropscipublisher.com/files/upfiles/file/puboziwolita.pdfIn PDF document text
    • http://fini.hu/userfiles/file/30371050129.pdfIn PDF document text
    • http://kasaitogo.com/uploads/files/zinufixokebokebugamo.pdfIn PDF document text
    • https://arvikabc.com/images/uploadedimages/file/vajogunesakuwo.pdfIn PDF document text
    • https://eqonetech.com/upload/userfiles/files/novewaradevawimukubufeluk.pdfIn PDF document text
    • http://quickvideo.nl/userfiles/file/12646352651.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160f26a7fce5eb---vipaxoginidogaruvifuki.pdfIn PDF document text
    • http://xiaohecollege.com/d/files/72237147916.pdfIn PDF document text
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/7fcd077c46f806f4bfcdfc980a67cf18/71321492226.pdfIn PDF document text
    • http://biancoacolori.it/userfiles/files/75743930351.pdfIn PDF document text
    • http://fruitvita.com/files/files/vajejumiregaxowajawo.pdfIn PDF document text
    • http://aep-tc.com/cache/fck_files/file/85264124608.pdfIn PDF document text
    • https://aymexco.ro/ckfinder/userfiles/files/86266394857.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_off00010d8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D8B 11176 bytes
SHA-256: 8383d443ceb48a51d26ee63f9abf325e51b270b2d5c9f3924e78aa4c300bc5d2
font_01_sfnt_off00012759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12759 17552 bytes
SHA-256: e2bf57aec1455c5b0f2079f974ce915d11cab7f362c2049713f17b7df5230957
font_02_sfnt_off00015441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15441 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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