Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c0f77c7fe7a4b66…

MALICIOUS

PDF

104.5 KB Created: 2021-07-01 23:29:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: a54d7e8380ebc2f5f4d17718e9f255aa SHA-1: 66511c1c5eb5151b9cc636576c2b84fca996d449 SHA-256: 0c0f77c7fe7a4b661423cd24c1d6909d2afc1c0d3b0de50791f506f5003df2d1
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest a phishing or malware distribution intent. No scripts were extracted, but the structure and URL patterns are typical of phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://cructi.ru/uplcv?utm_term=stale+meaning+in+punjabi PDF link annotation
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/304da8e279a1e0e8b67fa8efa245ec6c/58931716793.pdfIn PDF document text
    • http://asupuro.com/user_data/image//file/41719812049.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077df05dc069---66592336332.pdfIn PDF document text
    • http://fields-on-earth.com/27069184577.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/7a9aad1b2ee3c77ad577f5c92effc09d/70494688219.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/5c2842b97f5ca54b8b175876f45904b5/sepofivon.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160abed515108a---genutezapudaduzoferupiliz.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/r1ftk3hobd912d9m0nonm8td7i/dawaxiguli.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/f6ma0lkiuodea0l55cne224tbm/3469750530.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/95a10f14b23639db406e0334d2edc38d/mofokibajez.pdfIn PDF document text
    • http://astro2sphere.com/admin/images/file/jixenifine.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/p4l9k8e7ckuiq3nj6dljebrecm/vuwoguvubiperuna.pdfIn PDF document text
    • https://mattress-leader.com/media/rawijaperisu.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/b97a4e77505358a229d87dff614e183e/98234560386.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160828ab0ad139---ninewubes.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/dosebutav.pdfIn PDF document text
    • http://insidethedigitaltrend.biz/userfiles/file/kejebuwirij.pdfIn PDF document text
    • https://energooptima.hu/upload/File/9216153484.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607a1fa043287---tebonuta.pdfIn PDF document text
    • http://arlingtonhigh1961.com/clients/e/ef/ef36f0800c0a5d5a0b00d5ecc8c3c6da/File/pizokosovewutavoluji.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/16091569cd486c---jijawiviraruwiraxavipo.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_off00013988.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13988 10652 bytes
SHA-256: 037d8c0950398af08fb96bcef5f20f30fdbecbd62e6f50327aeea91a686f96f1
font_01_sfnt_off0001519b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1519B 16208 bytes
SHA-256: 9fea78be295ca8b2c6d0b0518d89352a0df62a759367d99627ba3b6ef2df7325
font_02_sfnt_off00017b19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17B19 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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