Malicious PDF — malware analysis report

Static analysis result for SHA-256 7512655c307cb7e0…

MALICIOUS

PDF

174.3 KB Created: 2021-07-14 04:24:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 9cc54b7b84d38b9c8e626f918a0d7b45 SHA-1: 061bc6ac1aba7ccbc3d22ca5c67cc35df1dce682 SHA-256: 7512655c307cb7e03191520aad234a013f4e4de14e094b79e0180d2f74df1a90
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, pointing to compromised CMS upload storage across multiple distinct hosts. The embedded URLs are likely used to distribute phishing content or further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9788

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 http://renovfab-menuiserie.com/userfiles/file/97644263254.pdf In PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608565de2af78---kigalazikowobimekokivuza.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/97ba760d54111527727bf945cf57b51e/13608882484.pdfIn PDF document text
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/d145b058f4ed0cd6e0ca9fc73899efcc/fojugufopepumoxotov.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160b18426391b9---wijexudejago.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/3d5ig7s5idfqll67r1gjkbfet5/mofuxuvalefiboliveke.pdfIn PDF document text
    • https://abeess.com/userfiles/file/74617440334.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/sredh6730ombkr1rsvket3q1jo/36322114825.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/5332d597f4d92b4553277cc0d7c372e3/99403110631.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/1ee3acef39dd3062a2882cd81109b85f/32617534923.pdfIn PDF document text
    • http://dishandspoonproductions.com/ckfinder/userfiles/files/86711012940.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/7cfc92952c56bf5bec2ddd1ec765bef0/mawotizokenidivuti.pdfIn PDF document text
    • https://avela.md/userfiles/file/75563473019.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/854891b26f6ced7b7fbb8e94e9f7d98e/vifosabugipasuvudijobis.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/12b2235ce631d67bf86e26775d079ba6/64638459658.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607813863ce8b---bosepebux.pdfIn PDF document text
    • http://ecole.ru/text/images/file/62493884630.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abf52d3b41e---jepuxapudiwatodi.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/70lvf13nb0571v775rqbifkuk7/wabexasimo.pdfIn PDF document text
    • https://flexrocksrollovers.com/wp-content/plugins/super-forms/uploads/php/files/jv3jgb5kk2q7uq4a6mrh7oncsp/99493536592.pdfIn PDF document text
    • https://edu-mate.kr/_UploadFile/Images/file/sanajeti.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=story+of+jaelPDF link annotation
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/a38dcf4a6bcf93ff4db7e02b9c085bb0/wasipavoso.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00022891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22891 19076 bytes
SHA-256: 07999107524e016ffaa4c8abf0550380884f34de9d0ae9602f682d8a641328a0
font_01_sfnt_off00024889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24889 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000260a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x260A0 10164 bytes
SHA-256: 4c33c881b5d956539faf22bbe5c96a7d3ee26cee4ef8e740fbc9d604dd4a6579
font_03_sfnt_off00027796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27796 20316 bytes
SHA-256: d8d44e39df36a3d5ad0b91d91e37fdcdbddea40a4070d209c3257e7221c0b239

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