Malicious PDF — malware analysis report

Static analysis result for SHA-256 f34aa6c18e715d56…

MALICIOUS

PDF

82.9 KB Created: 2021-09-07 15:08:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 6d8ecb661fa99e861dce1ff24611e029 SHA-1: c5612c18f3811df605d7872a38c3265e33967326 SHA-256: f34aa6c18e715d56c304763485b41e744de52d06367d718f063656c825a60a53
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://queure.ru/uplcv?utm_term=manual+tester+qa+tools PDF link annotation
    • https://ijp2.com/contents//files/79289118073.pdfIn PDF document text
    • https://tigapilar.com/upload/files/kituwaziv.pdfIn PDF document text
    • http://3xlove.com/uploadfile/file/21651136031.pdfIn PDF document text
    • http://yetisirkaucuk.com/firma/files/90689843883.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a22e6900f4f---dizoxenuvitubulajo.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160eca4751da81---13409275943.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080ebc5d7935---69490080226.pdfIn PDF document text
    • http://vhktn.at/images/content/files/fofakofumuduki.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/2a7f8cc43acae7d0142c215654f4c62e/70967058016.pdfIn PDF document text
    • https://comfortinnbarrie.com/phpsites/vertical_living/uploads/file/58784586272.pdfIn PDF document text
    • http://reversetheclocknow.com/ckfinder/userfiles/files/wesovaxibatapefipanawubuk.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b8c74039a8a---selebo.pdfIn PDF document text
    • https://najarshi.com/basefile/najarshicom/files/24469390312.pdfIn PDF document text
    • http://3colorjazz.com/fckeditor/userfiles/image/bubofawurezinenit.pdfIn PDF document text
    • http://brixtontaxi.com/survey/userfiles/files/89749382651.pdfIn PDF document text
    • http://pytextiles.com/userfiles/file/tigase.pdfIn PDF document text
    • https://sogelec-eng.com/files/ckfinder/files/24327742391.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160787d565f934---jowotak.pdfIn PDF document text
    • https://theatresaucinema.fr/uploads/file/97872535428.pdfIn PDF document text
    • http://agriturismolataggiasca.eu/userfiles/files/70937617803.pdfIn PDF document text
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/df14e3f3012492ebff5824cabb64a6fc/83084823081.pdfIn PDF document text
    • http://linkingpeople.info/userfiles/file/91297199558.pdfIn PDF document text
    • https://dptech.vn/uploads/files/45123873177.pdfIn PDF document text
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3ab9305f0---xowelal.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_off0000e19c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE19C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f9ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AE 17064 bytes
SHA-256: 123c65bda9b6eafd6163cd735a4484b54d4625c33690b1e4234fcfdc12485a8d
font_02_sfnt_off0001263c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1263C 10248 bytes
SHA-256: 0b36a1dfe56e494937c0d8eff5d29d610ef5c727385a04a1d6754e03d7fe6926

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