Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c67e29ee36d61ec…

MALICIOUS

PDF

88.7 KB Created: 2021-07-08 08:17:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 0450605af912e998f433942f29f84180 SHA-1: 95031273dcd3401c93bfb7de4fc12dd4ce803262 SHA-256: 6c67e29ee36d61ecd334a808bdc4e3d0d21b1caba423a92689c09bbc393bec78
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs and link farms suggest a phishing or malware distribution campaign, directing users to potentially compromised websites. The PDF structure and embedded content indicate it's designed to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://smidgel.ru/uplcv?utm_term=app+to+delete+double+pictures PDF link annotation
    • https://atcotourismtravel.com/userfiles/file/61439797195.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/89sh625dj6mep1cjvukl2lodln/wemebeki.pdfIn PDF document text
    • http://wu-pao.com/upfiles/editor/files/rigapajexoridatenedosaras.pdfIn PDF document text
    • http://3bbb.fr/ckeditor/upload/files/koxanodukemobuxuzerixema.pdfIn PDF document text
    • http://www.yoko-ono.be/images/userfiles/file/6762986331.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca16e85a6a---pizonagosi.pdfIn PDF document text
    • https://windsbs.biz/files/file/kaparonisabe.pdfIn PDF document text
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/b2b6be7685c037410d66cf6e7ba612d9/sijunutetonegodedijiliken.pdfIn PDF document text
    • http://daimarconstrucciones.com/images/admin/file/39644451878.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160861ec8d55a2---pawegabugeguremoxeg.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c059dd95f48---padirewamo.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/984a573f1b4ba8bb933528e8a0d80881/78191143473.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/7s09fb971q2ggucf6rc8rshkd2/81548041157.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b41da43fce0---tajuden.pdfIn PDF document text
    • http://kutyasturak.hu/images/files/36131366214.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/52217328296.pdfIn PDF document text
    • https://ringid.vn/ckfinder/userfiles/files/17427101002.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a928160e236---figuvozuvor.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/8d8b2bf0df09cfdba02409b5c0ae3386/68525788123.pdfIn PDF document text
    • http://naturallabs.de/userfiles/file/59918821510.pdfIn PDF document text
    • http://mosjob.ru/images/file/59311132289.pdfIn PDF document text
    • http://foodchemsino.com/d/files/76165775793.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c087641658a---2854281887.pdfIn PDF document text
    • http://thebookmarkcafe.com/uploads/files/tozofetusowiroworomejuj.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_off0000f754.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF754 10460 bytes
SHA-256: 86f2df31f978ade9d1c07c6feeb5ddf9a8d0c630209eafb7e60b4181fe0a986f
font_01_sfnt_off00010ef8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EF8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001270a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1270A 17672 bytes
SHA-256: 94b09b20b7c010c1c18a0af7ff5dca8189bb826b8ec0293bc524d8086976dde4

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