Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1db434759feeead…

MALICIOUS

PDF

87.4 KB Created: 2021-07-06 13:47:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 7e6ec3d4dbe5abeefa020b767e65f334 SHA-1: 35a985fd962c5095d47f84934fef5d242b4ec3c9 SHA-256: a1db434759feeead1af325cff038d9050531e4e79b0e052af526d1372e714aac
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution intent. It contains numerous external URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The PDF structure and embedded URLs are consistent with techniques used to deliver malicious content or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://laborke.ru/uplcv?utm_term=pdf+to+word+converter+online+no+email PDF link annotation
    • https://egca.fr/userfiles/file/35457349493.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/fb2b06b0076907f586a2891f8a9df50f/fazifavolawafogufe.pdfIn PDF document text
    • http://homeopathyhongkong.cn/files/22823518553.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/f23985e82d79d4826787737489f7a15e/86371276644.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16090fc220b670---xuriwatiguzuremek.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609be2980938c---baxikuligubi.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb64c29979a---niziwi.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/fut9h3sq7eqh6ifglpohqe65e3/11398773194.pdfIn PDF document text
    • http://artecgroupservices.com/imagenes/file/bazimajixatinosufilu.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/16080837c17c92---79179075502.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/2a0ffd89419f90496bcb6c33a6465e33/60421318396.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160df7844d2abf---52342179359.pdfIn PDF document text
    • http://oilandgaswork.com/userfiles/file/7146026008.pdfIn PDF document text
    • http://savaksangida.com/resimler/files/84709680310.pdfIn PDF document text
    • http://fogathajtohirek.hu/fckfiles/file/zezapupusujuwuvuji.pdfIn PDF document text
    • https://www.picmephotoboothhire.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606c98b6a830c---bimox.pdfIn PDF document text
    • https://cartolmania.it/file/84511058146.pdfIn PDF document text
    • http://absigorta.come/file/ragodil.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/81525946602.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160ab881e0b3df---tulirewarojadudemerogix.pdfIn PDF document text
    • https://visionbrindes.com/admin/fckeditor/userfiles/file/50826701815.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/93804258945.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b89494a546c---silidobunizepenometobo.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_off0000f2a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2A2 10620 bytes
SHA-256: 6af4160ed1c42bd785e311222bed57ca2fdf83743a0975f7ff7340c042fd09bf
font_01_sfnt_off00010af4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AF4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012306.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12306 17356 bytes
SHA-256: 77665c5d884961a8f6b620384b69217b16f74eef199c96e61a801bb03410bd8e

Open this report in the interactive analyzer, or submit your own file for analysis.