Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4236c6358e2ffa2…

MALICIOUS

PDF

86.4 KB Created: 2021-09-01 06:57:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: 18d2bbb35e6bfd50d9233d84e808a616 SHA-1: 91368a19013146ef3071e3547d7a930f1ef1e4fd SHA-256: c4236c6358e2ffa2958040087a9c86ce1feb0d1ad0f34320c8e9519362bb6cba
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to numerous URLs, many hosted on compromised CMS upload directories or disposable domains, suggesting a phishing or malware distribution attempt. The presence of embedded URLs and the nature of the link farm heuristics indicate an attempt to redirect users to malicious content.

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://badoza.net/userfiles/file/bugasotitalijofizis.pdf In PDF document text
    • http://maryalo.com/userData/board/file/8184235339.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/bpaq2qqthuamld2jgu1b05bie7/votidesiparokobupam.pdfIn PDF document text
    • http://profitoolinfo.ru/ckfinder/userfiles/files/56305044457.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16103bdd870d33---76663620827.pdfIn PDF document text
    • http://merlegdoktor.hu/tmp/35431092392.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b7a1299433c---67264042932.pdfIn PDF document text
    • https://ukmriptek.org/codeIgniter-hmvc/userfiles/files/12651363813.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/8u7fcmovjs0mkp22t3kr3rvaks/95196639553.pdfIn PDF document text
    • http://zakuskymoser.cz/www/ckfinder/userfiles/files/68773023680.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/7df66febcaacd3a5698a7340e06f14fc/51652901753.pdfIn PDF document text
    • http://finproekt-msk.ru/userfiles/file/86740899596.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef229090d6---47480899633.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6b5dedca92---24203843090.pdfIn PDF document text
    • https://shellserva.nl/docs/Image/file/ruxadufowezilizifukizo.pdfIn PDF document text
    • http://uelzecht.lu/userfiles/files/58841172090.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/e0fb33e982aa1e93efca13a6a008becd/50483973624.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612dc1eeb6a81---fizuwuberide.pdfIn PDF document text
    • http://wallsfamilyreunion.com/clients/876683/File/powokokomejimazalutuzezu.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/30517fb0501eac6fb1f097c00d43017a/wugezuwudedarozesuf.pdfIn PDF document text
    • http://jts-electrical.co.uk/ckfinder/userfiles/files/nusikovurikiruxupavaxomip.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d610cdccaa8---97070898307.pdfIn PDF document text
    • https://bhsbeacon.com/FCKeditor/file/dobodarogatazexikunalu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=36+strategies+for+striking+it+rich+in+commodity+trading+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_off0000e6a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000febd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEBD 11468 bytes
SHA-256: 3830f735ab25cb3f5606a762392f2f736f0a4dabb922afafe1187596b26650c4
font_02_sfnt_off00011981.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11981 18152 bytes
SHA-256: a40302473fa0d9c3260609dd261ff501fdce0eee2a3caaa8a5ef33e5dedc4ed1

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