Malicious PDF — malware analysis report

Static analysis result for SHA-256 09e00d8115939d48…

MALICIOUS

PDF

91.9 KB Created: 2021-06-26 09:19:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 31464f5ee1f3b81045d4ed586dc26b41 SHA-1: f8e0e8ecb5f2f880f1d724f7fd0bacd5fb616671 SHA-256: 09e00d8115939d48de1078619b955288a9bc71d98af3824c751e15745c751c9e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting, suggesting a phishing or malicious redirection scheme. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to lure users to external sites for further compromise. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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 http://liebherr-tr.com/userfiles/file/zafovafi.pdf In PDF document text
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/gijukezuwijexus.pdfIn PDF document text
    • https://dynasty888.com/image/files/20210615_142625.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/a8ccfac884ecc79291565118df7ae216/wogam.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b2de8e8eb6---guwibezotabamu.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160be44c1b0ea2---zarivujavokazulari.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/t57116es7pecg8kce2d4m3i431/bofufopelewerogipetame.pdfIn PDF document text
    • http://shqinze.net/admin/upimg/file///varivokadetome.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/u13r9rkthghsm787t652hqppcf/44382848106.pdfIn PDF document text
    • http://anatolianlgs.com/userfiles/file/18547339115.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/7c1574e2f36ac824fc263e6ec0b61e5a/62735757241.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4b37e9ce75---5949124646.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/0bqeo45jcs0aec55rl18pkbgud/77152848278.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/5uo5eumfj06n5ht2qaivdq0aq5/jujopivoliluxinolapoduje.pdfIn PDF document text
    • https://zoldlepes.hu/userfiles/file/sibezotis.pdfIn PDF document text
    • http://nhatngungoisaoxanh.com/upload/files/kemonezomuvula.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160842a89ed39a---kutiravuvorikaxodetope.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/jk5r3ucg4b0ni4cbcl2274d35q/55640137625.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/83174149637.pdfIn PDF document text
    • http://bbfederico2.net/userfiles/file/50281750932.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/4nqkhmdnrjvvghtha7sb6m34nk/navezufivabiwavumawu.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb196c30b6---mavem.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/3590016792.pdfIn PDF document text
    • http://schmetterlingsgaerten.de/file/90274375522.pdfIn PDF document text
    • https://chetanaus.org/bheru/uploadfiles/file/70349149359.pdfIn PDF document text
    • http://jakebenmd.com/clients/0/0e/0eef9d569b11303d075d19626cc6f958/File/koxogozevimobizito.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=scrum+user+story+formatPDF 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_off00010492.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10492 10544 bytes
SHA-256: 2374ea151f590a118ba1eb4f7366b9c5b9c5e5eff8d834f279b4b9aeffc5ac54
font_01_sfnt_off00011cba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CBA 17368 bytes
SHA-256: 4dde9ef013bd466cf9665bc84d9f28c2f7d1c64cb643a12a933caa113671554b
font_02_sfnt_off00014a31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A31 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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