Malicious PDF — malware analysis report

Static analysis result for SHA-256 f735e7c3aa97164a…

MALICIOUS

PDF

70.8 KB Created: 2021-08-28 04:54:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 8043e1e98480692ad24e1afa7e30a023 SHA-1: c16b9b2f5509877522525ae7824e8cd3d846d1fd SHA-256: f735e7c3aa97164a9b66e5e003070b32d08612abad406a7b8ad8f166e0995adf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, directing users to multiple external URLs, many of which are hosted on compromised WordPress sites or disposable domains. The primary intent appears to be to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://pixomot.ru/uplcv?utm_term=who+coined+the+word+environment PDF link annotation
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6bd01ac44a---76977021903.pdfIn PDF document text
    • http://flirdining.com/uploads/files/tozutuvebofelepigug.pdfIn PDF document text
    • http://7tec.ru/userfiles/files/5761468531.pdfIn PDF document text
    • http://euro520.net/userfiles/file/16210604821107523669.pdfIn PDF document text
    • https://etre-cheval.fr/Applications/MAMP/htdocs/etre%20cheval/news_pix/file/29730636372.pdfIn PDF document text
    • https://sandzak.best/wp-content/plugins/super-forms/uploads/php/files/afd0c229c64ee69a045947d68f04a278/56187963901.pdfIn PDF document text
    • http://skncn.com/u/files/kanijevisepomome.pdfIn PDF document text
    • https://timjanen.se/anvandarbilder/53/files/58594941652.pdfIn PDF document text
    • https://guruamardaspublicschool.com/userfiles/files/37543116446.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/161060b4094627---40543104355.pdfIn PDF document text
    • https://speakingparrot.com/upload/ckfinder/files/32737956317.pdfIn PDF document text
    • http://khamtribacninh.com/images/files/misokupatezap.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160fdf6e8c912d---78280692602.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160aa6fa0ecb9e---71593900034.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160a2a06641b1c---62323590384.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608544b9b0d49---52990228366.pdfIn PDF document text
    • https://warungmimpishio.com/contents//files/toranatotukisuzazawakuwim.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210723043401582.pdfIn PDF document text
    • http://dgkno.cn/upload/85756570204.pdfIn PDF document text
    • http://anandtouristcorporation.com/uploads/domaw.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160872b549cef3---90994368443.pdfIn PDF document text
    • http://xn--pr3b03lcdvwu9dpynqkc.com/DATA/file/20210629182454.pdfIn PDF document text
    • https://vasantviharproperties.com/userfiles/file/28738405838.pdfIn PDF document text
    • http://maksimetall.ru/files/budetemudubu.pdfIn PDF document text
    • http://zjleiou.com/images/upload/File/61920606095.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b9c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9C1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d1d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1D8 10404 bytes
SHA-256: 31be20abb6cf4bc1f19971f7b77da966ac42c0685cae1b45248adffff5a66f85
font_02_sfnt_off0000e938.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE938 14224 bytes
SHA-256: 60edd5051d83b0721fdab97cd517c031651daa211588bd721841ab9c6084f160

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