Malicious PDF — malware analysis report

Static analysis result for SHA-256 97c524e32b353a26…

MALICIOUS

PDF

75.3 KB Created: 2021-07-30 06:19:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: bf41e7f31469258064cb6aab37452951 SHA-1: 5e38aa23f15b805624add5cad58f80f7437dfa46 SHA-256: 97c524e32b353a263f7e2f92b0ab1917d018f618b6f0fde321321cde2573dd29
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs pointing to link farms hosted on compromised or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript suggests an attempt to execute code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9907

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://cructi.ru/uplcv?utm_term=mera+bhola+hai+bhandari+song+download+mr+jatt+hansraj PDF link annotation
    • http://hitecds.com/userfiles/file/doxonefexagilarakuzude.pdfIn PDF document text
    • https://dancleland.com/img/upload/file/zezumuxavokalaxutufuzigej.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fe92a40e9ad---lofova.pdfIn PDF document text
    • http://smit-electronic.hr/upload/datoteke/joror.pdfIn PDF document text
    • http://www.makattakasinti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f085ed0bdc---puzezavavefe.pdfIn PDF document text
    • http://allycatering.com/userfiles/28542958911.pdfIn PDF document text
    • http://clinicaveterinariaalbese.eu/userfiles/files/lijigasazupeziku.pdfIn PDF document text
    • https://nikosdimos.gr/userfiles/file/nubaxixesixotipifineze.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/736abab76c8e90298d5764182949993e/85365749018.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6b658544bc---mamama.pdfIn PDF document text
    • https://www.perfumista.co.uk/wp-content/plugins/super-forms/uploads/php/files/1f602930a7c0e497a3643fef8642b7d6/33972856125.pdfIn PDF document text
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087b6d903f7b---kekudajavokutupujozid.pdfIn PDF document text
    • http://fxmeat.com/upload/file/cc5883424cd448bca5566371f5acf687.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160f04baaaeb58---58982576055.pdfIn PDF document text
    • http://webdulich.com/js/ckfinder/userfiles/files/lukoguna.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160fcce4c6718a---94171361438.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c86d8e5c05d---mataposevufuvosejot.pdfIn PDF document text
    • http://photo-preiss.com/upload_files/files/4167692775.pdfIn PDF document text
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090a6d73c122---56003268702.pdfIn PDF document text
    • http://manninareunion2012.com/clients/0/03/03b30fdf9aaeeba733afadbef254ff7b/File/mabezivodokaxis.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/tolupirisinuvuginirugibir.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/160970f1c5ace6---58242598171.pdfIn PDF document text
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/21aad6fdae4e02630525f32bc677d0af/fizifemoxugujizalojegafa.pdfIn PDF document text
    • https://aokman-drive.com/d/files/54942978498.pdfIn PDF document text
    • http://opuspoint.com/ckfinder/userfiles/files/33883349275.pdfIn PDF document text
    • http://kondicionery-ivanteevka.ru/upload_picture/file/rirewonuravovoxisaso.pdfIn PDF document text
    • http://arserwood.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/210509001418502064922ggn.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_off0000c330.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC330 16292 bytes
SHA-256: 584384be27893bbb6890bcfd2eb89529e11637295f02ea6294026aa38952037b
font_01_sfnt_off0000ed9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000105b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105B3 11044 bytes
SHA-256: 619b1d3fb9788fd4cce5bd18e172a67b9843c2edb71fc95696caaf7ff842225b

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