Malicious PDF — malware analysis report

Static analysis result for SHA-256 482149d7d614cd2c…

MALICIOUS

PDF

91.2 KB Created: 2021-07-01 20:19:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 09b42b8ff17aa0785b1d6eb093df4b03 SHA-1: d9972cb14dacf93745de0a8219e90b7993f48d81 SHA-256: 482149d7d614cd2c068455b53ffe74ec1d9675390df985b8a2808b4563fd5605
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to compromised websites and disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://nomylo.ru/uplcv?utm_term=inability+to+swallow+medical+term PDF link annotation
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/a90fbb7121ed502eb7f132b82bf1896a/92404743263.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae03d3738b4---12425604586.pdfIn PDF document text
    • https://bleikss.com/userfiles/file/3547579451.pdfIn PDF document text
    • http://jtour.vn/userfiles/file/dujapifukokufoj.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/lk2nte3rd0k41hm0f4b6cks5he/xuzudu.pdfIn PDF document text
    • http://peaceinsrilanka.lk/userfiles/file/vafuzi.pdfIn PDF document text
    • http://arslanemlak.come/file/fesakiroxuzaguga.pdfIn PDF document text
    • http://sosonomo.com/ckfinder/userfiles/files/dolivizowe.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/ff65fd7abda035aac0be82de97872e28/giwumojewenavitewi.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/4ddtcivj37csqe3rtski7q8ant/xiwopobavop.pdfIn PDF document text
    • https://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/735cc9b476a37eb2619b0b08208b64b1/lugof.pdfIn PDF document text
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/5b7df20102aa389cc39898034c90fc1d/pepirekitekuzefaxa.pdfIn PDF document text
    • http://canyonoaksmtg.com/~duckdi5/canyonoaksmtg.com/content/file/kuterutolagofut.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b228472087---tokugopifokixunosuvivazib.pdfIn PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca11b7a039---nazolasenelosewuwopupum.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/75340306929.pdfIn PDF document text
    • https://tennis94.fr/img/pics/files/89292284544.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16085cf4947d0b---45668663455.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc7736b6ab---7641553590.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/20223349867.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608ab65ee7637---mejulewejelexupuvo.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/2k6us6asqhpou1j4e1k2deo5f2/52342662736.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_off0001011d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1011D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001192f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1192F 17436 bytes
SHA-256: 42061ae3b6c649b68998eab64f88f188b5d4fed68f7506d4c33dc42aafb14f10
font_02_sfnt_off0001467c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1467C 10824 bytes
SHA-256: 9b8b443596424186811e1110e373acc57532cc7b5ff42ca5233aba66d4084b42

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