Malicious PDF — malware analysis report

Static analysis result for SHA-256 80ff6862013d2166…

MALICIOUS

PDF

86.9 KB Created: 2021-06-30 06:21:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7e90b776d7811cca74bd1c7b3d7e0e6f SHA-1: 19f24fceee6b41e44086cc7336be13f01b4fa576 SHA-256: 80ff6862013d21667025bbc7148a071c13f32134ed71f6ddc09171e0c28a8f4b
156 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised WordPress sites and other domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to distributing further malware or phishing content. No scripts were extracted, but the embedded URLs and heuristic firings point to a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://ketchas.ru/uplcv?utm_term=how+to+combine+2+pdfs+into+one+file PDF link annotation
    • https://www.alapan.org/fckimages/file/zodadin.pdfIn PDF document text
    • https://www.ndgai.com/wp-content/plugins/super-forms/uploads/php/files/op50fb1ld4a4mhe55ote15s8i7/77699127363.pdfIn PDF document text
    • http://lorichphoto.com/pictures/file/77431752139.pdfIn PDF document text
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/5fc8290800dd86d5e6bbcd8313acca9c/zewugimukut.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ae5287ea7d8---dotexurim.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608c140e903c7---konafotosasatin.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/e5011f543bd239d9d535f47f64e87bed/jolalikuzezil.pdfIn PDF document text
    • https://fajndoktor.cz/images/file/files/lunuzatafaxafubedaxota.pdfIn PDF document text
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c30b48c69a---muxafelubamofixe.pdfIn PDF document text
    • https://otartufo.com/ckfinder/tartufofiles/files/xenek.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dcd59b42d3---paxiwuxes.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/5b787bc66d4a87e51ffd0d2e25b0a107/terikojewebofogubol.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa0f9ae5c98---63052482999.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1609cd48d5fd7c---pigigoveposeregigo.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/ac0f8e152517396a80523d5f2775111f/xisuwomegobevop.pdfIn PDF document text
    • https://haltia.mx/sii/ckfinder/userfiles/files/50101462823.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/g2j1ii6i5qtbe0q4nrbjdfr5a4/63461693876.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160851f11b4e5d---kunuwepekizoturibefute.pdfIn PDF document text
    • http://thietbiotoviet.com/Images_upload/files/zutenegejoxavij.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/1b1692964d5c40f44a25b0b294565328/89477414777.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/160847aba5ec9e---190374010.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9c87f00aa---64161320495.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b818788f11e---30918998516.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/3cea9ad904f5fafd4a9f56a7e8487641/46469106649.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/kl2sa4nluc3n3l295k9evfrsik/38892349532.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_off0000f0e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E7 16896 bytes
SHA-256: ce158914bced0d07433eee98c20b9c31cb66201a83d8430d9ac3b76a7a980735
font_01_sfnt_off00011cfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CFC 10856 bytes
SHA-256: c4726fb43b065f900b3329aa353d5fe9e0e705ca8cadf7747fbe04735defdb0e
font_02_sfnt_off000135de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135DE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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