Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e302e1354182c14…

MALICIOUS

PDF

86.2 KB Created: 2021-09-13 22:07:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 90e3484dcb893f81720e8c5431133880 SHA-1: 2d8bb5201bb73ca3fa444422bef9c0616acab06a SHA-256: 7e302e1354182c14b66fe41c78259d7e7f3dc466748aa30c7cf54ad07b4c5ba3
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://xrtradingfeedback.com/cmsimages/file/76544141959.pdf
    • http://landpas.pl/upload/file/tileviwafozutigejofa.pdf
    • http://nawooelcs.com/upload/userfiles/2021/09/files/210909021649.pdf
    • http://xn--or3bi2da319p.com/upload/fckeditor/file/80524021653.pdf
    • https://inprovitparaguay.com/ckfinder/userfiles/files/8051979342.pdf
    • https://emenu.hu/editor_up/96427108591.pdf
    • https://luxesystem.site/js/ckfinder/userfiles/files/jobemenugaxabaxepal.pdf
    • https://vietnamairlinescorp.org/js/ckfinder/userfiles/files/53558600836.pdf
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/161346f42f27b9---dazuwovu.pdf
    • http://euredit-editions.com/userfiles/file/lefofezola.pdf
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16130111d87a28---62734122226.pdf
    • http://tuhocxuatnhapkhau.com/uploads/ckfinder/files/jafejozesu.pdf
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/161312691b8d98---makotizuwimemebovixeg.pdf
    • http://onishi-kyosendo.jp/archive/25397545597.pdf
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132b0d2b7de7---59988159698.pdf
    • https://minervatech.work/js/ckfinder/userfiles/files/679783318.pdf
    • https://triangle-electronics.com/assets/userfiles/file/sirasetetu.pdf
    • https://adtw1.elfjane.com/ckfinder/userfiles/files/bizumelevobunadiw.pdf
    • http://geologicatoscana.eu/userfiles/files/finutoropa.pdf
    • https://geneolock.com/ckfinder/userfiles/files/buripimunebitizajovem.pdf
    • https://geneticapanama.com/userfiles/file/32291844167.pdf
    • http://chukguwang.com/files/fckeditor/file/55488900645.pdf
    • http://getwealthythisyear.com/ckfinder/userfiles/files/runuz.pdf
    • http://aleshashop.net/uploaded_files/userfiles/files/rejemufatiniwirob.pdf
    • http://hcbarrett.com/user_area/file/28173394101.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=fast+and+furious+2+full+movie+online
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb2b.bin
de09f9802b17e6d33bf285e67265c92585e990fc570b872c2e099e9aa20393e4
pdf-font-stream PDF embedded font (sfnt) at offset 0xEB2B 10780 bytes
font_01_sfnt_off0001040a.bin
b179455074c378396b406f4428d95de05d71e72d50228a992e7c8be1e652e735
pdf-font-stream PDF embedded font (sfnt) at offset 0x1040A 18012 bytes
font_02_sfnt_off000132c8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x132C8 16792 bytes