Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c440f7a370e0f94…

MALICIOUS

PDF

85.2 KB Created: 2021-06-29 17:28:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 7025c2b27f5525be58de601ebb763b9d SHA-1: aaa3fd537312a07010fb3b7c588f75b8528a03b2 SHA-256: 2c440f7a370e0f94a803736886419eec300423dfb723f52d920fa7e8b7353340
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded URLs, many of which point to compromised WordPress installations. The ML classifier strongly indicates maliciousness. The primary purpose appears to be acting as a link farm, redirecting users to potentially malicious or phishing sites, as evidenced by the numerous external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • 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://crewmak.ru/uplcv?utm_term=bses+payment+status PDF link annotation
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/p3uks525bkg22b7osc2redllpr/42155282390.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16095d1f5d64eb---gojepedebasas.pdfIn PDF document text
    • http://bukharaalpharetta.com/sites/default/files/file/fomimonomaxojubef.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaf9fcebb8a---febutapenuxikolubopoxaf.pdfIn PDF document text
    • https://roeveragri.ac.in/wp-content/plugins/super-forms/uploads/php/files/2c043479fed8b7c444048b96080ce2cb/jasizerugu.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/rovedowi.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/luferekavuxamudunufok.pdfIn PDF document text
    • https://coil.hk/upload/files/wiwoj.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/031659269315.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc01912b78b---pegoberinoxubitidobus.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076900572d11---linidirixupekigaxa.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5667e2e413---59337861772.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/8schen210ve0tqg8239ucl9tf5/fomatulule.pdfIn PDF document text
    • https://arte-salon.ru/upload_picture/nesawotetutaviwiwazadu.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/g2u3bglh9llv199981ksv8uoa5/60592594051.pdfIn PDF document text
    • http://gdgom.com/upload/file/210622195026423524ia5o6r18t3hk.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/mesagofidibopibitufed.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/e6f500f7204648762d181d235e247acd/nexerujajutotobefufeju.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/83ffb12b1b17b9aaaf352f9c02b88ed4/15533632764.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/24007b72204c8282dc0bfdab754b90d8/lorozujesolorisadagutu.pdfIn PDF document text
    • http://creativeindustries.ru/uploads/userfiles/file/lofibebevodikijasuvi.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16093fdadeae5a---puwekemukataponuwisekax.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/9514370051.pdfIn PDF document text
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/cfm9u5gcq2r3t31efabjl12ei1/jenidatevubugeve.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_off0000eb70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB70 17036 bytes
SHA-256: c2ee57ffe2de618af4890006aa4d0c794cd47a9c8a548b0982f9876bee948d56
font_01_sfnt_off00011824.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11824 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001303b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1303B 10324 bytes
SHA-256: 2898bfc6fd092d4b5b8b3efb7fdd34b0e620538abc199dd51c06c66c9f574050

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