Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c25fa63ad65e86f…

MALICIOUS

PDF

83.7 KB Created: 2021-08-04 16:24:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 93bd9adf0773ffc9988da04637f09b13 SHA-1: 741736f00163e7dd46cee42a9ec4edcb4af37060 SHA-256: 2c25fa63ad65e86f1bb57687772a3444b5a1af74ccf74726576844da5594d377
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and ML classifiers flagged it as malicious. It contains multiple links to compromised WordPress sites, suggesting a phishing or malware distribution lure. The presence of embedded URLs and the nature of the heuristics indicate an attempt to redirect the user to malicious content, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b324da8c42d---rilopetivu.pdf In PDF document text
    • https://www.notusweb.com.br/ckeditor/ckfinder/userfiles/files/buvekugubedofezuxixa.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/789b6099ef7bf7e2d7ae491750278ceb/sotazenerutamemuzi.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/d2bb6e7b4fe8eef0c197edcb057aee10/buwuxedagovezal.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/e87a3706ee9bda889a46c35dbb0a0f69/23846731492.pdfIn PDF document text
    • http://nedirajtebosnu.net/userfiles/file/93986764613.pdfIn PDF document text
    • http://mirandatutoringcentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ade4f66aede---jokawegagiwu.pdfIn PDF document text
    • http://easyliveconstruction.com/ci/userfiles/files/depatatuzirigipokepaxezo.pdfIn PDF document text
    • http://studioarchperissinotto.eu/userfiles/files/68459904326.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ad639313e---66937433733.pdfIn PDF document text
    • http://pabrikangka.com/contents//files/79233600213.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/7a53242ade6032f24fa5298e7026c0c2/84754757977.pdfIn PDF document text
    • http://chapelguild.com/images/usr/24652367207.pdfIn PDF document text
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/16075a98855585---51513022078.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/d1ef4446304c0ed47bf1aa007a3b9111/41980624461.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a01bc819dda---latizomamaxidonejezapeso.pdfIn PDF document text
    • http://moto-trend.cz/public/files/fck/file/xozuwitizivivokabinidi.pdfIn PDF document text
    • http://fashionflutters.com/ckfinder/userfiles/files/33071388176.pdfIn PDF document text
    • http://nfraccon.org/userfiles/file/bujedorulavukisa.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079b6b455937---netofebipuwosaxovadorik.pdfIn PDF document text
    • http://vietsonplastic.com/uploads/userfiles/file/keralevigakemenoruravudo.pdfIn PDF document text
    • http://championshipsportsrings.com/clients/23492/File/wobetikelulidedaku.pdfIn PDF document text
    • http://jtour.vn/userfiles/file/vugevoj.pdfIn PDF document text
    • http://haumeaonline.com/userfiles/file/jovebajifo.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160d383ab159dd---wegezipe.pdfPDF link annotation
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=past+simple+and+past+continuous+exercises+multiple+choice+pdfPDF link annotation
    • 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_off0000e038.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE038 11088 bytes
SHA-256: cb6e0c4c17e4924e26e74c3ce947164bd19ea6667655463a340c5bc5f338c4cc
font_01_sfnt_off0000f9da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9DA 17400 bytes
SHA-256: c0e0fd08f7ece346a4407b67b0ee87bfa0fe1791362980bfce489693d9d3f4e3
font_02_sfnt_off00012779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12779 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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