Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0665804d94beecd…

MALICIOUS

PDF

74.1 KB Created: 2021-09-02 17:50:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: f2ae367b06fdd784c73c10d260b3d6d1 SHA-1: 096836295873f19741978930bcc1146906e3801c SHA-256: a0665804d94beecd2923376db65c38e1ffd0ba53b815111cc6866f63babdaced
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the nature of the link farm and the presence of external URIs suggest it is intended to lead users to malicious content, likely via a spearphishing attachment delivery vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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=destination+b1+pdf+free+download PDF link annotation
    • http://szpital-sulecin.pl/images/fckfiles/file/82025215062.pdfIn PDF document text
    • https://dialogueinpraxis.net/files/docs/69401543360.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac18df2f451---15051416066.pdfIn PDF document text
    • https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/f633bd2caf9a1b6c7063874f2b4a6152/44854190711.pdfIn PDF document text
    • http://rusiuojigalvoji.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160f1d06d54e94---95302856596.pdfIn PDF document text
    • http://szhlfz.net/upload/6304730703.pdfIn PDF document text
    • http://majstrissmt.eu/www-data/file/25539529149.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/0bc1919b6eccac007520dc36f88ea1cb/jimuze.pdfIn PDF document text
    • https://daulte.ch/ckfinder/userfiles/files/17100139617.pdfIn PDF document text
    • https://honkakuji.jp/honkakuji/images/ckfinder/files/61450601359.pdfIn PDF document text
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202104291649423921.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608ff8b979b38---66398130710.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/ednecnu54etin9elfp6fu9rcul/nawamejukusuto.pdfIn PDF document text
    • http://szyqjsj.com/UploadFile/file/20210820231157095.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d5d4212e3f6---45786620185.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160827aa474cac---75998340497.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/junosapokanovili.pdfIn PDF document text
    • http://arch-teh.com/pic/userfile/nudagutufinegete.pdfIn PDF document text
    • http://benevolo.it/userfiles/files/91629311830.pdfIn PDF document text
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/a8864d228c31377845c3205d764e1cee/28529173449.pdfIn PDF document text
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/a7ceee253d7c4cecb7502dfc849587df/kerisubojizavobavisixadu.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_off0000ba51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA51 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d268.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD268 10772 bytes
SHA-256: 70a59775d242448e92d3575a35d84cd18ce6ec8452a75d57a8f5d1d55f9813f4
font_02_sfnt_off0000eb33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB33 18480 bytes
SHA-256: 1ad68decf0029749c57fbfa573d257b401e7c0e14f8dbb3ab790cf0f43049e49

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