Malicious PDF — malware analysis report

Static analysis result for SHA-256 30382bb9c10014ce…

MALICIOUS

PDF

102.9 KB Created: 2021-09-02 12:10:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 16d69dfd456666896e13e4525aa967a9 SHA-1: 0d4cb29da71c1796f99e52d062432742e6a1dfff SHA-256: 30382bb9c10014ce0ba3289be904845286b1a362f5e1ef3b351cc45b6b6c736b
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to websites hosted on compromised CMS platforms or utilize disposable hosting, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://voyagevietnamlaos.com/hinhanh/file/79717603429.pdf In PDF document text
    • https://seeandhearbetter.ie/img/shop/contents/81496464128.pdfIn PDF document text
    • http://abacusnancy.com/userfiles/file/12710721627.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/l9gqi9r2ht4dna6bf27glupb80/karexomawuvefanu.pdfIn PDF document text
    • http://posekatzahradu.cz/files/file/namap.pdfIn PDF document text
    • https://argumentua.com/i/file/kurixozobuwasubeberisa.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611420222d972---1309600843.pdfIn PDF document text
    • http://unsersohn.ch/images/file/refedu.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/596ccc51f349e15ffb8d9014868eb9bc/46549819190.pdfIn PDF document text
    • http://alternativefitness.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608cd42f2991c---93898004211.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/b69d9c0cf97cad798efdd07ae91d654d/wagisopibalexelijek.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1611d69f5d2c58---pulelijiredabire.pdfIn PDF document text
    • http://architettobotteonpierpaolostudioabacus.it/userfiles/files/duzoweketadil.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d22e203c435---mupudalifetetuzenizejo.pdfIn PDF document text
    • https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/0dc32d53cf65c6b6d3ea238e432953ec/tevajerikowi.pdfIn PDF document text
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/16077cba168524---39632088966.pdfIn PDF document text
    • http://oiseau-bleu-morzine.com/userfiles/file/4401221092.pdfIn PDF document text
    • https://jbdclothiers.net/emailer/userfiles/file/sipewevadasidilujakiwesa.pdfIn PDF document text
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f773cc9595---bubegurevi.pdfIn PDF document text
    • https://keralatemples.info/ckfinder/userfiles/files/48234923747.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=barbara+kruger+biography+pdfPDF 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_off00012a8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A8D 19448 bytes
SHA-256: 5cd956db769cdacca49ee6038cbcee1ba6d1ef6a2e91e8ae91fc8628b78db32f
font_01_sfnt_off00015d42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D42 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00017559.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17559 10860 bytes
SHA-256: a879b3cd8f06b1959b741568ae0530f5ca469c85da725ffcd228f37fb9d60ba1

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