Malicious PDF — malware analysis report

Static analysis result for SHA-256 c62e03b85eb1ead2…

MALICIOUS

PDF

84.3 KB Created: 2021-06-29 12:15:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 1dd32b4cd1ffd809fb36efea8789b14a SHA-1: 3051b98f7eb9809bd9b2cd7bf9f78d4d590001d9 SHA-256: c62e03b85eb1ead21f1ac81126df4506b14242edc42741be777f9139c269b8c1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating it is likely a phishing or malware distribution lure. Numerous external URLs are embedded, many pointing to compromised CMS upload directories, suggesting an attempt to redirect users to malicious content. The PDF structure itself does not contain readable content, but the heuristics and URLs strongly suggest a malicious intent to exploit users via external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://crewmak.ru/uplcv?utm_term=cavapoo+mixed+with+toy+poodle PDF link annotation
    • http://essuances.com/ckfinder/userfiles/files/lemit.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/965d84d5f0533b97b6148e8b39a30802/tobumubasa.pdfIn PDF document text
    • http://banghetretruc.com/media/ftp/file/25716524600.pdfIn PDF document text
    • http://ahdongjiu.com/upload_fck/file/2021-4-29/20210429102237238008.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/fc7e7d4a32cd333458f58c41c6395e68/xebivituxoke.pdfIn PDF document text
    • https://www.karavanlakesfet.com/wp-content/plugins/super-forms/uploads/php/files/41b46b0a16fd654de51bc565c5c3fd24/witabemoximupejixepemetuj.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/6ddeb54cceb99c4856ba60ea5a511606/67680076325.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609838aaea6fc---75534465351.pdfIn PDF document text
    • http://circolosilverblufitnessclub.eu/userfiles/files/60075541480.pdfIn PDF document text
    • https://yingzhaoliuart.com/upload/file/11035725956.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/6a1fefaa862e0e590b54d711ea39a00a/fufewinoxifo.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160886fbb7545f---72916814170.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/89eee598a021258d96bcbe30dab1a8e5/lotilu.pdfIn PDF document text
    • https://addsfly.com/userfiles/file/regilivarewabigixuge.pdfIn PDF document text
    • http://momsystem.ru/public/file/76327818023.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/1k1139eka0k1dqr97n031nf580/77861553150.pdfIn PDF document text
    • https://wagaskar.com/media/gekirulitaj.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a88639d1a0d---20584561665.pdfIn PDF document text
    • http://fobas.cz/userfiles/file/3936080995.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/63be5b00e2e23907eb794a548ffe9f3e/bodilejizegupusosolel.pdfIn PDF document text
    • http://funperm.ru/content/file/zurusarajedefimotibagi.pdfIn PDF document text
    • http://solarhomepage.ch/fckeditor/editor/images/file/fuwowe.pdfIn PDF document text
    • https://artbynela.com/uploads/file/narebuvilaritunenu.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e836.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE836 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001004d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1004D 10684 bytes
SHA-256: 708a657d51a32590c0be322a8363db9ef86d5989a3a80ff5f20ba471c4ec1713
font_02_sfnt_off000118dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118DC 16760 bytes
SHA-256: 9bb94645309114671d1f7e57a1a8fd9232befaa903771a88998e90af727bbffe

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