Malicious PDF — malware analysis report

Static analysis result for SHA-256 80880f69655a114d…

MALICIOUS

PDF

93.0 KB Created: 2021-07-04 22:44:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 9e0aaa176af47009d141b8b5e5a5e32c SHA-1: 0de823847f6fe4a145addbb22050a097d20fdb35 SHA-256: 80880f69655a114d87a8a06ffc7a37b6978bd5715d3fd219214c6ed3437a854c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm directing to multiple domains, many of which are hosted on compromised CMS uploads or disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the structure and URL patterns are consistent with malicious PDFs designed to lure users to malicious sites.

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 https://stratasphere.online/userfiles/file/lodevodezasomatikazurajo.pdf In PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/ce3feca1beb26968c2d4e3133e459e71/dirugodusob.pdfIn PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/kumunisinelukakitozotob.pdfIn PDF document text
    • http://vijyaiprismcrm.com/userfiles/files/jobakonamopusozamovibi.pdfIn PDF document text
    • http://ricoconsultingattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pelanusisetuxapoxorexo.pdfIn PDF document text
    • http://engroupe.ca/aym_image/files/76549673404.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608975ee9af97---nuxilape.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be9d12cb32e---regabakiwaw.pdfIn PDF document text
    • https://efnnma.org/files/file/65820811210.pdfIn PDF document text
    • https://www.alarisusallc.com/wp-content/plugins/super-forms/uploads/php/files/b2bb69bc752f8bf0d10baf263e4a16c6/jevolula.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/56241230896.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f0711d61de---86907074864.pdfIn PDF document text
    • http://lideparts.com/userfiles/file/1622404019.pdfIn PDF document text
    • https://kalyna.ua/sites/default/files/userfiles/file/jisexawef.pdfIn PDF document text
    • http://clinicaveterinariabilancino.it/userfiles/files/63376750307.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607b2a30721e9---mitesujevebomebusip.pdfIn PDF document text
    • https://www.sudburyhighspeedinternet.ca/wp-content/plugins/super-forms/uploads/php/files/64288c2c358559f9e3f596eac2c8ac3c/sakudopew.pdfIn PDF document text
    • http://kasintorn.com/images/upload/files/dawuxodurutiratilo.pdfIn PDF document text
    • http://roland-toys.eu/userfiles/file/lesajara.pdfIn PDF document text
    • http://stevis.cz/files/file/66147345583.pdfIn PDF document text
    • http://wallsfamily1912.com/clients/876683/File/74800430970.pdfIn PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/9ffadc235c957a521b6faa6feec54613/xetomekonogibusufox.pdfIn PDF document text
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/e2756f3070a9bc4a2335507c62204ae3/40593261585.pdfIn PDF document text
    • https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/nqeudm8ff369rucjssqt1k0l0u/43409902707.pdfIn PDF document text
    • http://gandolfiarchitetti.com/userfiles/files/pajaxasigi.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/63760ebdc7bab451608830125b5b298b/dulafam.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=how+to+manual+in+skate+3+xbox+onePDF 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_off000105e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105E0 10852 bytes
SHA-256: 2973c75fed9f7dc2e21a648bc632f4e6aebcef82926985b82487549fbc1e056f
font_01_sfnt_off00011f05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F05 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013717.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13717 18856 bytes
SHA-256: ccf304642267795b2635432c1bd35f4b14bf4d38bbff02b9a322b2f2074aab7e