Malicious PDF — malware analysis report

Static analysis result for SHA-256 cce1e976e532fbee…

MALICIOUS

PDF

74.2 KB Created: 2021-06-29 07:46:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 1cd4eaaf5489bfb613ab85c9557cd42d SHA-1: 4f117706487ef33b7e134a038400d4dbb85f1e3f SHA-256: cce1e976e532fbee84a37f7b912f13dc1db0d9f6ce68f24a9882db4f6e0285b3
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution via these 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 http://baschin-heizung.com/meineBilderAlbertGrundschule/file/sagazotigen.pdf In PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/af15e21d92cb7d58bd2f25a597cc13f2/korimefozafapuwe.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ade5092b4ae---nafakitevulumal.pdfIn PDF document text
    • https://www.demetagras.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077c69b1b6d9---vemenud.pdfIn PDF document text
    • http://computerdoki.hu/user/file/1036707254.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/8884d3d1a0c2e323e690ad9106a2feac/xujupekenirir.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160add7c38e7c3---xasimodafilabir.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/bcgqmtna6ksbbbcukl2engi6p9/nakeduzilodumelirinor.pdfIn PDF document text
    • http://anapro.com/ckfinder/userfiles/files/25585695.pdfIn PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1608639de2cd40---13302329172.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a85c9c009d6---paluzivadulasa.pdfIn PDF document text
    • http://domholidays.com/userfiles/file/dabeweneza.pdfIn PDF document text
    • https://angkorphotographyguide.com/userfiles/file/surika.pdfIn PDF document text
    • https://sunrise-photon.com/upfiles/editor/files/napurorave.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/d3e574813ae7aab9f4e1a4093aad3f70/94379145084.pdfIn PDF document text
    • https://bestofbucerias.com/upload/file/27576085179.pdfIn PDF document text
    • http://yesilderecine.com/admin/editor_resim/file/502018795.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160afbc77ab66f---lekezunowokovi.pdfIn PDF document text
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/6f1fb7e82643536db42293a481dd2f6c/83587335607.pdfIn PDF document text
    • https://onhimalayas.com/ckfinder/userfiles/files/10434354289.pdfIn PDF document text
    • http://chatfieldfarms101.com/userimages/12673024352.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/orugn4ogso8vrfdve35k1j3jg7/60752057094.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609b5322a1a5d---sezikuvovunuvavaxu.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/1608caf65b44a7---22994472807.pdfIn PDF document text
    • http://wagnerpc.com/userfiles/files/27320378363.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=core+java+interview+questions+and+answers+for+freshersPDF 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_off0000c217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC217 15616 bytes
SHA-256: cfcfec0e30ae3921e29b1658b198bef075ce087e540c056367e5ec31ef8c7ce1
font_01_sfnt_off0000e9df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9DF 10964 bytes
SHA-256: 79af53dea4f70b2182b9b976a2278484b6fd3bf698ba2f48d876c870142eb3e9
font_02_sfnt_off0001031f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1031F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1