Malicious PDF — malware analysis report

Static analysis result for SHA-256 f65e7879d50f240f…

MALICIOUS

PDF

69.9 KB Created: 2021-09-24 23:34:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 3df532e861dfa970b87a19f09420c819 SHA-1: 442360abac2bc493a4af0c538e50248fdf3c9743 SHA-256: f65e7879d50f240fd25bbbdce5ed5d090813cca80430197e0c10b269dd567618
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs that point to various domains, suggesting a link farm designed to redirect users to potentially harmful content. The presence of 'utm_term' in one of the URLs further supports the phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://smidgel.ru/uplcv?utm_term=procreate+apk+gratuit PDF link annotation
    • http://savages.lu/imagesRTE/files/95595494720.pdfIn PDF document text
    • http://confidenzacsapagy.hu/upload/womijeb.pdfIn PDF document text
    • http://midospa.com/upload/files/bomuru.pdfIn PDF document text
    • http://holzbau-napetschnig.at/wemabujoxufo.pdfIn PDF document text
    • http://acril.ru/ufiles/files/67961039035.pdfIn PDF document text
    • http://studiobardinisrl.com/userfiles/files/71545627189.pdfIn PDF document text
    • http://massimobertoarchitetto.com/userfiles/files/jenajesewifa.pdfIn PDF document text
    • https://magerp.org/upload/files/49742748443.pdfIn PDF document text
    • http://innotack.com/userfiles/file/71784011272.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/rq8qn35p103g9bgkb8iiupa3f2/rabezox.pdfIn PDF document text
    • http://baihsad.com/userfiles/files/20210918_041229.pdfIn PDF document text
    • https://cnn-logistics.com/asset/files/renokusitarawixodomis.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613b3b17c8568---39841908105.pdfIn PDF document text
    • https://www.drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16145be8136103---zanuturukaliso.pdfIn PDF document text
    • https://ntiverification.com/userfiles/file/89760288233.pdfIn PDF document text
    • http://paoladebenedetti.eu/userfiles/files/69305793336.pdfIn PDF document text
    • http://xn--djr00fsyfv0o5qgy9u.net/filespath/files/20210919084539.pdfIn PDF document text
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/bec997e3b47c397f81474dd82b77c268/97139832635.pdfIn PDF document text
    • http://knipia.com/userfiles/file/77969671984.pdfIn PDF document text
    • http://enslev-anlaegsservice.dk/userfiles/file/bidikupiwuvonevala.pdfIn PDF document text
    • http://maraulsan.com/ckfinder/userfiles/files/lawebom.pdfIn PDF document text
    • https://www.lire-les-notes.com/ckfinder/userfiles/files/jifokixoxosogetamedoxev.pdfIn PDF document text
    • http://sanmorales.es/userfiles/files/sakazupesulonaloremara.pdfIn PDF document text
    • https://novitas.ro/files/76630989399.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_off0000afdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFDB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c7ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7ED 17016 bytes
SHA-256: 04afa4b8633e3802646a5536b5d730b59325b2631b49f7970544130c810fae10
font_02_sfnt_off0000f283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF283 10424 bytes
SHA-256: ac5b73c41e9b22959668faad8da75ad18454801f371b39e1df120b3c26de8a0d

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