Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf4ea7c06274aa26…

MALICIOUS

PDF

81.0 KB Created: 2021-09-06 15:55:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 1b700f474fcdd8d8daec10d63ca3557c SHA-1: eb55ae3118b36ac125b05d08478a2c04b1d3761c SHA-256: bf4ea7c06274aa26ea732ea6b599970ae5d70c3c96fb753a5c299dc1a27cbb00
156 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous URLs pointing to various domains, many of which are hosted on compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body is heavily obfuscated and unreadable, providing no direct content clues, but the heuristic firings and URL analysis are sufficient to infer a malicious link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://vigen12.com/userfiles/file/gowamaxawakutirero.pdf In PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b225f7ed4d3---92817323910.pdfIn PDF document text
    • https://reparationmobile.net/userfiles/file/timurebaraxugivavinumeba.pdfIn PDF document text
    • http://kronospan-mofa.hu/editor_up/lijiwifelexolesorimowab.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607aabca63775---59443883881.pdfIn PDF document text
    • http://inwallendorf.de/userfiles/file/8619872918.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba56af723d6---87119018981.pdfIn PDF document text
    • http://gruppocreta.com/userfiles/files/98785261379.pdfIn PDF document text
    • http://iglozawiercie.pl/zdjecia/file/32291710383.pdfIn PDF document text
    • http://dailyliving.nl/ckfinder/userfiles/files/xitafuzusiva.pdfIn PDF document text
    • http://nuraski.pl/wsg/userfiles/82432923607.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/160bbad4aad55c---87928185528.pdfIn PDF document text
    • https://makenie.com/upload/files/mitituvaxovedibuduzozu.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6a85c8344a---rigetowepi.pdfIn PDF document text
    • http://massimomoroni.it/userfiles/files/vudeliz.pdfIn PDF document text
    • http://vinhhangvien.com/upload/files/puxibesokegepab.pdfIn PDF document text
    • http://kuehllawpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/rabesasasilakojululojufa.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1610001e246975---55546325897.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbda2a0f1ab---zuxepijalubakexixepedupig.pdfIn PDF document text
    • http://doggystylzgrooming.com/admin/photos/file/69798683576.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/94f6e963f99d7c60e9f603403c48990a/75528852634.pdfIn PDF document text
    • http://xn----7sbabaajmdfbk3ddf3azka3b6a2r.xn--p1ai/ckfinder/userfiles/files/verosapavapa.pdfIn PDF document text
    • https://norservis.com/files/files/juxovewenoberaxa.pdfIn PDF document text
    • https://hiampelectric.com/wp-content/plugins/super-forms/uploads/php/files/8d1d88e1ee488149195d854f412ecbb1/64331137116.pdfIn PDF document text
    • http://www.pro9apps.com/app/webroot/files/uploadimagesfile/57078398755.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b15e7518036---47918677430.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=the+psychology+of+man%27s+possible+evolution+pdfPDF link annotation
    • 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_off0000d47e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD47E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ec95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC95 11384 bytes
SHA-256: 2f73ae17fd8a95c8d6e6d227a0c0d508108551a7979d4d183506ad4bd1a96e69
font_02_sfnt_off000106f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106F1 18136 bytes
SHA-256: 2da9b402fc528e60c9d15fc3fa2b260cf913a9a18ab3a4c2b9bd07419b5e70c9

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