Malicious PDF — malware analysis report

Static analysis result for SHA-256 55eb60df07e537c4…

MALICIOUS

PDF

69.3 KB Created: 2021-09-27 17:15:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 0a90b3711a66ac21e1ff6cf3e73ee7bc SHA-1: 03e9b9f48450330b0dfe05d1b9a5b31c04466886 SHA-256: 55eb60df07e537c49d48389e91a4e8bdb3c66d3961b34f4bbde2cb66e2efef92
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. Additionally, the document features a link farm pointing to multiple external websites, many of which are hosted on compromised WordPress sites or disposable domains. These links likely serve as lures for phishing or to download further malicious payloads, as indicated by the ClamAV detection and ML classifier.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://bringem.de/wp-content/plugins/super-forms/uploads/php/files/48b02aae9dfd6c1b0cf38a7a5d6f42af/68309420122.pdf In PDF document text
    • http://saltokisport.com/uploads/files/20447880264.pdfIn PDF document text
    • http://mylodge-naoshima.com/images/blog/file/nekokip.pdfIn PDF document text
    • https://rippa.pt/files/file/71648012218.pdfIn PDF document text
    • https://curvy.tw/upload/files/bubigovikoduz.pdfIn PDF document text
    • http://appartenvue.net/appart/upload/images/41309219316.pdfIn PDF document text
    • https://llibreriaha.com/img/events/file/8808361229.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/2373940d224167ccb7c0b3b41594f1ab/97524833891.pdfIn PDF document text
    • http://herbwaterthailand.com/userfiles/files/rivofefeninivakubi.pdfIn PDF document text
    • https://limpiezasinasel.com/userfiles/files/55187144722.pdfIn PDF document text
    • https://phunhai.net/upload/files/80645673852.pdfIn PDF document text
    • http://arucax.am/user_images/file/vuloxowusanupezito.pdfIn PDF document text
    • http://z-him.ru/userfiles/file/kazebigiwovadewo.pdfIn PDF document text
    • https://eletroluz-al.com/_IMG/img_internas/file/jidinaverozigunulizol.pdfIn PDF document text
    • http://due.pt/js/ckfinder/userfiles/files/28228556356.pdfIn PDF document text
    • http://senkyu.jp/webroot/img/files/sufalomewilinudoveg.pdfIn PDF document text
    • http://ativn.com/upload/file/73901452841.pdfIn PDF document text
    • https://lmbri.com/WYSIWYGImage/file/46170797363.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145cb353b720---97038364745.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/e2ea0c95cdefd73d109d1af198386ca6/xabasumozigebudevorif.pdfIn PDF document text
    • http://studiobardinisrl.com/userfiles/files/60159834349.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/161336ba34fe92---refelitoranunizago.pdfIn PDF document text
    • https://glycocalyx.nl/userfiles/image/file/nudoradudojive.pdfIn PDF document text
    • http://bbmpva.nl/fckassets/file/mejujikosovimo.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/19ea2831100f3685b1846f344855b088/73661330703.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=download+gta+sa+android+1.08PDF 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_off0000b110.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB110 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c922.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC922 14824 bytes
SHA-256: 9f65a8644185f8ea8846ebf8fca987c3c78a9f5b345f134859f6a03988d204f2
font_02_sfnt_off0000eeac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEAC 10828 bytes
SHA-256: 1a2b944b83102bcf3e05418de6e38ae84040592763857eaed09e699e0ed9cd58

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