Malicious PDF — malware analysis report

Static analysis result for SHA-256 85a1f5f05d70ec85…

MALICIOUS

PDF

81.1 KB Created: 2021-09-07 00:56:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 6752f4502baadfc840489f78a5701170 SHA-1: 9b7fecbe78ad78c72eb8b42c5bc1eed62f079f8b SHA-256: 85a1f5f05d70ec85aeebaaacf0103546219cc940a0b8d0176aa0235dc7cecd30
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to external websites, including those hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing or malware distribution sites. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://biometria.pl/photos_fck/file/mudupofaxeratikiwidux.pdf In PDF document text
    • http://tauben-buchmeier.de/kleinberliner-schuetzen/userfiles/files/94519037504.pdfIn PDF document text
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/1d843bfba4362e9e605da9ccf3c0c352/85575293476.pdfIn PDF document text
    • http://computer-rudolstadt.de/upload/file/37644444152.pdfIn PDF document text
    • http://christopherdallo.com/file/diwugukadevejizebigibewa.pdfIn PDF document text
    • http://dh-life.com/ckfinder/userfiles/files/leramenatanep.pdfIn PDF document text
    • https://strategieb2b.com/userfiles/file/fajezafezudadajoga.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608c0d45e0c7a---fesekadedepozibafasu.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aa66b5e4104---31372180969.pdfIn PDF document text
    • http://tjsijiqing.com/ckfinder/userfiles/files/2021/0701/3b3c3025981d8fa49414200e8a4cb1d3.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/a75a316a844132b62b57f417b0cae1e6/jonowolesekekizexab.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/pejaxatomajomepumidubibu.pdfIn PDF document text
    • http://mijinmotor.com/fckeditor/userfiles/file/vunusapipuseru.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a57595e34c2---dagez.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b7f31df3bf---lenibadikevesowelanizi.pdfIn PDF document text
    • http://miwon.com.vn/app/webroot/uploads/files/sawirurerexoferikotavid.pdfIn PDF document text
    • https://castilloexterior.es/ckfinder/userfiles/files/zigav.pdfIn PDF document text
    • https://jodhpurtravels.com/nbloom/fckuploads/file/10205892737.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfbea27504b---dokopobomozalakunir.pdfIn PDF document text
    • http://aktifithalat.com/resimlerfiles/nozafepuvosugon.pdfIn PDF document text
    • http://donauwell.at/userfiles/file/17879928547.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a654929f6508966d88398e6cfc47f5b4/88065770804.pdfIn PDF document text
    • http://nature-revive.org/files/file/dubugakora.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=rework+jason+fried+david+heinemeier+hansson+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_off0000d600.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD600 18380 bytes
SHA-256: 95a940c72ea90bbbb33c6837ec37e933ebdb8bf512b0eabb25564daae79588e2
font_01_sfnt_off000104bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104BB 11036 bytes
SHA-256: db2208d44cf6e05b8c5fa97a0a65ae9bfc6286a88845faa2b1731b9fb9cf2f8f
font_02_sfnt_off00011e3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E3F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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