Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2a05c1ae9cf2ce9…

MALICIOUS

PDF

87.7 KB Created: 2021-08-04 02:09:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 3b265276ed14f6e133b4860c5a2960e3 SHA-1: 5dee6901e65f009c1c1b3aa9d3cbae5f844865f7 SHA-256: f2a05c1ae9cf2ce94fba3f39d12fa8f4fcdd3024f2a495580816412552d06463
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://irlanc.ru/uplcv?utm_term=king+kong+3+full+movie+in+hindi+free+download+hd+720p PDF link annotation
    • http://etasystem.net/userfiles/files/sunugixubiwo.pdfIn PDF document text
    • http://desagresbrts.com/clients/34568/File/xemoginiwilezenuno.pdfIn PDF document text
    • http://9meclinic.com/ckfinder/userfiles/files/keloxasalo.pdfIn PDF document text
    • http://kozelskadm.ru/files/uploads/files/penuno.pdfIn PDF document text
    • http://teleinwestor.pl/userfiles/file/roroposase.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/cgftiltms8t4upjiu93gqlsgi4/3902558096.pdfIn PDF document text
    • https://doosradashak.in/ci/userfiles/files/9099326491.pdfIn PDF document text
    • http://www.makattakasinti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0bced8dda---tojidigoxumepufu.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/0fdbaca9b4fbe56ce8007144da2f1762/ralenenajuzedesat.pdfIn PDF document text
    • http://keralabiblesociety.com/fck_uploads/file/37677423589.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/7e29d38d97c6c443475ce3b84da7b6b8/ruzifasilopilikowapawi.pdfIn PDF document text
    • http://usmleworkout.com/files/file/limuratodolonugesido.pdfIn PDF document text
    • http://penzion-u-zamku.cz/files/file/8386157245.pdfIn PDF document text
    • https://ethiquedevelopers.com/wp-content/plugins/super-forms/uploads/php/files/1bf6b3d1d1363f40996e9349d987ffee/verat.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/82410284973.pdfIn PDF document text
    • http://ideatity.com/ckfinder/userfiles/files/zukaketixuxakepin.pdfIn PDF document text
    • http://xn--k1akb4c.xn--p1ai/userfiles/file/ronavizasunukas.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f4d28d50cac3eddc4645b39ef7d93b22/52231760785.pdfIn PDF document text
    • http://grawerlik.pl/userfiles/file/sutavepel.pdfIn PDF document text
    • https://prtl.pl/userfiles/file/24977015593.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082896b7722e---bigeganisojulipatanirofos.pdfIn PDF document text
    • http://wignaccent.com/FCKeditor_2.6.3/userimages/file/20210721005459.pdfIn PDF document text
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160910e1955475---44412714846.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_off0000ee65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE65 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001067c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1067C 11480 bytes
SHA-256: 9d9a15709d39d420b4b48894ae86316dfb545e5d62606fe23d08126976aba6dd
font_02_sfnt_off0001215b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1215B 17552 bytes
SHA-256: 56eddedde0e014cfe189e02a9bcfda242e9f97fbbc805c2bf9f92ce01b74967a

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