Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cb0c05a1a8a8b6c…

MALICIOUS

PDF

79.1 KB Created: 2021-09-08 22:33:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-03
MD5: 4081b10929bb34ad6396fff76d4af767 SHA-1: a588310c060a971e5bb5d32dd26606f1d64caaae SHA-256: 7cb0c05a1a8a8b6c7c9185cf9de479e6af278ff5f2a03554fca00eaa219196e1
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and contains embedded JavaScript, indicating a malicious intent to execute code or redirect users. The document also features a link farm pointing to various domains, likely for phishing or malware distribution, and includes a visual download button lure. The presence of embedded JavaScript suggests an attempt to download and execute further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

Heuristics 8

  • 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://chcial.ru/uplcv?utm_term=joseph+malayalam+movie+download+1080p PDF link annotation
    • http://artiguardia.pl/userfiles/file/62413258557.pdfIn PDF document text
    • http://taketty.xyz/js/ckfinder/userfiles/files/9108078838.pdfIn PDF document text
    • https://autoradiator.mn/uploads/ckfinder/files/57531652495.pdfIn PDF document text
    • http://tythb.com/uploadfile/files/89526225823.pdfIn PDF document text
    • https://www.lire-les-notes.com/ckfinder/userfiles/files/76679746064.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a4457306c84a51d5dea15704d94de15e/55587422291.pdfIn PDF document text
    • http://sevimticaret.net/userfiles/file/42333897322.pdfIn PDF document text
    • https://growyourmoney.in/userfiles/files/24781832706.pdfIn PDF document text
    • http://nbmounts.com/userfiles/file/1631083650.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161318c269d661---lumiguvazewem.pdfIn PDF document text
    • http://hani-bee.com/userfiles/files/semigeralesabolizor.pdfIn PDF document text
    • http://allmedicus.com/userfiles/file/56751381711.pdfIn PDF document text
    • http://ty-int.com/files/files/41089261268.pdfIn PDF document text
    • http://daglichtfilters.nl/ckfinder/userfiles/files/nixarigop.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/16137deb75ae62---15436187315.pdfIn PDF document text
    • http://rund.cz/UserFiles/File/konoxavasezuwira.pdfIn PDF document text
    • http://www.klccpa.com/userfiles/file/In PDF document text
    • https://nabijdefossa.nl/upload/files/46784429495.pdfIn PDF document text
    • http://kkc1.org/htdocs/cljr/data/files/kavatosije.pdfIn PDF document text
    • https://elnativocoffee.com/silver/upload/files/gafiloxejil.pdfIn PDF document text
    • https://omprintandpack.com/userfiles/file/50155022908.pdfIn PDF document text
    • http://sapaelitehotel.com/webroot/img/files/83108095409.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_off0000d1fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1FB 16556 bytes
SHA-256: 7077cdb5c88d700c83a3112f5dd8d151d2126b7490f3aec61022d686b47338e8
font_01_sfnt_off0000fd1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD1C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011533.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11533 11100 bytes
SHA-256: 654c3b894b628d259a7899e3fb92302ae9588a540519811ab1cd284beeba7b47

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