Malicious PDF — malware analysis report

Static analysis result for SHA-256 46e88b56acb05624…

MALICIOUS

PDF

96.2 KB Created: 2021-09-22 20:34:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2a431d5a19b2d666392606158017c53e SHA-1: ce18f8f9491de04cdb578c9faf3287dd489708a5 SHA-256: 46e88b56acb05624770fc35ac0af590ef1a735b1e08563d56d3d8d4e639bb7e7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external URIs, many of which point to disposable hosting or compromised CMS uploads. The heuristics indicate it functions as a link farm, likely intended to lure users to phishing or malware download sites. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://scbczy.cn/up_files/file/20210903_234611.pdf In PDF document text
    • http://prunay-en-yvelines.fr/ckfinder/userfiles/files/16560437555.pdfIn PDF document text
    • https://minlinart.com/archive/upload/files/datuwopewazonovi.pdfIn PDF document text
    • http://alphamarino.kz/images/news/file/90075697540.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/bbf5d052e6ff0516bc9556c68900f5d4/lufaxawikuluw.pdfIn PDF document text
    • http://xfswchem.com/upload/files/naxikozisosalin.pdfIn PDF document text
    • https://driftwoodcc.com/userfiles/files/wokewevosexokejijoxos.pdfIn PDF document text
    • http://prplus4u.com/ckupload/files/19087795337.pdfIn PDF document text
    • http://itemclinicchina.com/ckupload/files/baguxomuruwiwamuxilugow.pdfIn PDF document text
    • https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/btvvv8iu2qiukpa6l39lj9gp66/lazapawovuruzafama.pdfIn PDF document text
    • http://hissekurban.com/resimler/files/46331806041.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613505d8c9a17---98053677054.pdfIn PDF document text
    • https://chachachat.info/js/ckfinder/userfiles/files/3245022763.pdfIn PDF document text
    • http://hanasushimenifee.com/uploads/files/56091563672.pdfIn PDF document text
    • http://apsara.ru/userfiles/file/84001688335.pdfIn PDF document text
    • http://rlmlaw.com/images/edit_images/file/43607837983.pdfIn PDF document text
    • http://atrsara.ir/resource/files/50024030497.pdfIn PDF document text
    • http://chaukitchen.com/uploads/files/68177245078.pdfIn PDF document text
    • http://to-tuong.com/media/ckfinder/files/sulidegewugelaxelarigijap.pdfIn PDF document text
    • http://tlca.com/Content/uploads/files/jenufuxaribixap.pdfIn PDF document text
    • http://www.sauminandy.com/fckimages/file/nupawer.pdfIn PDF document text
    • https://hotelangela.hu/userfiles/file/97267033821.pdfIn PDF document text
    • http://bdsps.org/slbdavbatala/userfiles/file/18170661051.pdfIn PDF document text
    • http://shiny-baby.com/fileimage/file/pikuzunap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=3ds+emulator+roms+downloadPDF 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_off000112a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112A2 18596 bytes
SHA-256: b13c2b344ddc14cf0a4d7578b8747e6ab83ffa53e8a1de5843b57d8090ff20a4
font_01_sfnt_off000142c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142C8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015adf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15ADF 10576 bytes
SHA-256: bc775c2802841c5d1bdc9ed10b20b311a18090dbe07c64cfbf699ff7e0b97d65

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