Malicious PDF — malware analysis report

Static analysis result for SHA-256 7222e2a605e88d52…

MALICIOUS

PDF

96.6 KB Created: 2021-09-18 14:54:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: a5259cb06b5afd2460becbc4835e713b SHA-1: f08218f3adb4d80775652b7c125d4c78f7dac8ed SHA-256: 7222e2a605e88d52958ea326309ac2007a9fd0d3ce12ad2f2730b4e7e90aa48c
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URLs, many pointing to PDF files hosted on compromised websites, suggesting a link farm or distribution point for further malicious content. The presence of external URIs and the overall structure indicate an attempt to lure users to external sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://huntic.ru/uplcv?utm_term=naruto+shippuden+storm+4+senki+mod+legendary+shinobi+war+v4 PDF link annotation
    • http://shopabrang.com/images/files/weputesatodevot.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/r96nhptj3372dobrrf7m94dfrg/felimisolomep.pdfIn PDF document text
    • http://asbufestival.com/uploads/FCK_files/file/panexuzoxowomanun.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/sekerotuvidelo.pdfIn PDF document text
    • https://szallas-karpatalja.com/upload/79789603392.pdfIn PDF document text
    • http://zamgph.com/FCKeditor/editor/filemanager/connectors/php/uploads/file/100024531532.pdfIn PDF document text
    • http://kantoromega.pl/userfiles/file/85018111176.pdfIn PDF document text
    • https://cafesca.mx/ckfinder/userfiles/files/40865579058.pdfIn PDF document text
    • http://puzynowska-kancelaria.com/userfiles/file/3903093070.pdfIn PDF document text
    • https://divinenine.net/userfiles/file/tixatanumezabuvibada.pdfIn PDF document text
    • https://ddnepal.com/assets/userfiles/files/35284479715.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff27060de5---jawofunasepu.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614407205acd4---49274004621.pdfIn PDF document text
    • https://ldcpc.com/ckfinder/userfiles/files/52730895660.pdfIn PDF document text
    • http://aibasavar.edu.bd/app/webroot/ckfinder/userfiles/files/34303539859.pdfIn PDF document text
    • http://beijingteye.com/upload/files/waminoxizenulujixaj.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613dfe2eed7ed---64204501896.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16143dc3baf855---worisex.pdfIn PDF document text
    • http://www.39koratmachinery.com/file_upload/files/80722675671.pdfIn PDF document text
    • http://aan.kz/ckfinder/userfiles/files/32841763097.pdfIn PDF document text
    • http://crediramasrl.it/public/file/dekofodugedup.pdfIn PDF document text
    • http://www.multigacos.com/admin/uploaded/fck/file/turivokiziwi.pdfIn PDF document text
    • https://sjamsul-hidajat.id/ck_uploads/uploads/files/45701541675.pdfIn PDF document text
    • http://angelascanu.it/uploads/file/17104894356.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_off00010a5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A5E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012270.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12270 21252 bytes
SHA-256: 61ea04f82801cd18e088a10bed84d2f6fe77bca23d8a4c76bbb10c64405978ba
font_02_sfnt_off00015950.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15950 11492 bytes
SHA-256: 8eff815c7c3673970ce48680cc68346aa11375e51d909554f2b22fd0c6194de1

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