Malicious PDF — malware analysis report

Static analysis result for SHA-256 34863b900eb5071a…

MALICIOUS

PDF

80.0 KB Created: 2021-09-03 23:02:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 76238043cbfa0df74f0ffc1842f80af0 SHA-1: fed4e89c03ab95d091838d845b9bf872dce8db4d SHA-256: 34863b900eb5071a86db4a75257071f42e329a605aab9f3c79df7688051bb99b
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed for malicious redirection. The ClamAV detection and ML classifier strongly suggest a phishing or malware distribution intent. While no scripts were extracted, the structure and URL patterns are consistent with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://garglob.ru/uplcv?utm_term=motivation+letter+for+masters+sample+pdf PDF link annotation
    • http://alpha-th.com/userfiles/file/tedidepugobigupurufaxoxot.pdfIn PDF document text
    • https://evergreencans.com/userfiles/file/bofimujofokox.pdfIn PDF document text
    • http://panziofabian.hu/fck_kepek/kazegam.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/3fb817640ed9bd93a1dd1746008e8572/gevuf.pdfIn PDF document text
    • https://pointvirgule.ca/upload/editor/file/87614552861.pdfIn PDF document text
    • http://wolfroccatiassociati.it/userfiles/files/56764501426.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/efe14665f140b55717d321894231ac19/zefuvezadajiziguvodobafa.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be2115f1347---90995959119.pdfIn PDF document text
    • http://aias.pnu.ac.th/ckfinder/userfiles/files/kixezulawoguj.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/64452926525.pdfIn PDF document text
    • http://big-blue-bus.com/pics/fotos/1/file/8262826505.pdfIn PDF document text
    • https://sailstudy.in/ckfinder/userfiles/files/tabarulituzazuvuvano.pdfIn PDF document text
    • http://wagnerpc.com/userfiles/files/43562667489.pdfIn PDF document text
    • http://www.barbazan-debat.fr/ckfinder/userfiles/files/17039238230.pdfIn PDF document text
    • http://libron.pl/fckupload/assets/file/25009970990.pdfIn PDF document text
    • https://vendax.ro/files/file/gibefivawezotunegikazu.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/e2e0f47627c3be735b2d4d27c5bd14e8/pipamisajoxomobejere.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/refemakezenagoporudod.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/9a045rm0ssd27j4eioebhgd6j5/66594681228.pdfIn PDF document text
    • http://ville-dammarie.com/ckfinder/userfiles/files/60791105210.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160741d2d91190---xitolegiwukojafoxa.pdfIn PDF document text
    • http://aaykpn.com/uploads/editor/files/93761766818.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_off0000d087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD087 19640 bytes
SHA-256: 93cd4c346348431a893aa862e63456e01c4286e8f4adf04f0e241391ce3f0d75
font_01_sfnt_off000101e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101E8 10716 bytes
SHA-256: 131d756fabe89c3f513f43fa3c6913195fdd1fcfafe35c7771c2c6070609c2db
font_02_sfnt_off00011a88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A88 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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