Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b7296b903c4382c…

MALICIOUS

PDF

91.4 KB Created: 2021-09-05 23:09:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 733914038e535c61968d6d46b122aa52 SHA-1: 5c86aa02d63103e97a61879e47b0de926d17bc7d SHA-256: 1b7296b903c4382c11c51fd910d3a52291b4a799896ed9e07d0fe451bbdbd56a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links to external websites, many hosted on compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://nomylo.ru/uplcv?utm_term=nombres+cardinaux+et+ordinaux+en+anglais+pdf PDF link annotation
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/80v50oi9745f6vi0jonk4vl1c1/farodori.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/f7sq03t52q7gnkfktuifkcno84/67964456063.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160855eea63c01---15104279926.pdfIn PDF document text
    • https://travelsafeway.com/userfiles/file/40126010037.pdfIn PDF document text
    • http://berallebags.com/UploadFiles/FCKeditor/20210707203547.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/3mf180esoesq42ouio8lnohsii/potibekudipoxovexibu.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f4bdf3a8f7---48757085654.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dbf112b1bf---vorazomimekakegemijat.pdfIn PDF document text
    • http://zhfangyuan.com/uploadfiles/files/lejesakovuko.pdfIn PDF document text
    • https://hattshopping.com/admin/assets/images/ckfiles/monezop.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/a5eb2056064711c2b49c0d5f59aa3576/daxegekategi.pdfIn PDF document text
    • https://ddshower.com/ckfinder/userfiles/files/jefabuladonoxoze.pdfIn PDF document text
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/leb9ecuqvgqn6tkohopjbijg1v/berilutufifejepo.pdfIn PDF document text
    • http://heydarbaba.org/resimler/files/zadamumiraxeguvutukosox.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/bf6449b1c43f20900c135ac031d24232/36993960455.pdfIn PDF document text
    • http://www.proyecpapel.es/ckfinder/userfiles/files/datepomez.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160aab35627072---62313758340.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/p04nkhenlis5o4umdia4r6u631/sebozofajikifopalesedu.pdfIn PDF document text
    • http://graciaindoutama.com/kingkong/userfiles/files/mikowew.pdfIn PDF document text
    • http://knshzj.com/CKEdit/upload/files/nurokavozatoxuzo.pdfIn PDF document text
    • http://cambridgekapurthala.com/damana/userfiles/file/vinanixususile.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160f6444287179---38984357445.pdfIn PDF document text
    • http://americasbestmanassas.com/uploads/files/janawezuz.pdfIn PDF document text
    • 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_off0000f6a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A1 21744 bytes
SHA-256: b2eb693cc701f9453a53733fce1c415e64ba751a3550e7bb99c0d730e5442463
font_01_sfnt_off00012da8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DA8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000145bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145BF 11280 bytes
SHA-256: 828ee2a4b065feca302099f96eb2c5d3825ce491cdd20d442a8f6f47300cfd45

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