Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b168e0a0e5b8dc9…

MALICIOUS

PDF

80.7 KB Created: 2021-09-23 01:22:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 730e5b9b9a15e2fc98c04d8b984df7f7 SHA-1: 0cd49d082515eca951dc6c237516f08c50ac63a2 SHA-256: 7b168e0a0e5b8dc9045fad28096724a4d4b1e71fe25e7a3cc94cb96b8ee91d03
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains embedded JavaScript and numerous external links, many pointing to compromised or disposable hosting, suggesting a phishing or malware distribution attempt. The presence of embedded JavaScript indicates potential for further malicious actions, such as downloading additional payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 7

  • 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.
  • 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://archism.ru/uplcv?utm_term=annotated+first+aid+2019+pdf PDF link annotation
    • http://cpghollywood.com/userfiles/files/lisuvinutuw.pdfIn PDF document text
    • http://niezapominajkowo.eu/userfiles/file/96941677760.pdfIn PDF document text
    • http://onnetsolution.in/userfiles/file/mojunesivutus.pdfIn PDF document text
    • http://otoozevran.com/resimler/files/fawiguzik.pdfIn PDF document text
    • http://saopauloairporttransfers.com/ckfinder/userfiles/files/62926066304.pdfIn PDF document text
    • http://babijie.com/upload_fck/file/2021-9-3/20210903225000116997.pdfIn PDF document text
    • https://dichocungtoi.com/userfiles/file/kikunuw.pdfIn PDF document text
    • https://e-tta.com/app/webroot/userfiles/files/61320839318.pdfIn PDF document text
    • http://gemwishrs.com/ckfinder/stones/files/23618672039.pdfIn PDF document text
    • http://eldmsh1.ru/js/ckfinder/userfiles/files/mivalewijamawowezuvop.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/8edf4df833dd1bd6af3568cf605fc786/39481138107.pdfIn PDF document text
    • http://uteambio.com/upload/files/41651135091.pdfIn PDF document text
    • http://omatsuri.kr/data/userfiles/files/70647766857.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ac79c8e4da33bfdbc3b87d1e9d6bce01/39217234642.pdfIn PDF document text
    • https://projekt-lesen.de/userfiles/file/jovulazelelijipime.pdfIn PDF document text
    • http://herve-coiffure.ci/files/puluxixitikakowef.pdfIn PDF document text
    • http://s-pack.kr/userfiles/file/20210906081231.pdfIn PDF document text
    • http://gzlmjx.com/data/home/bxu2343160066/htdocs/uploadfile/files/tukopaxemokiw.pdfIn PDF document text
    • http://gazduire-domeniu.com/UserFiles/file/lanamonujopeza.pdfIn PDF document text
    • http://www.klimavill.com/data/editorfile/9991710049.pdfIn PDF document text
    • http://oralrem.kz/ckfinder/userfiles/files/pamujejomosul.pdfIn PDF document text
    • http://wumag.pl/userfiles/file/xupareni.pdfIn PDF document text
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/007k39ohs2h7h9qtvvl78s2an0/xogixamimoburu.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_off0000d569.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD569 10888 bytes
SHA-256: 64960dd24c72adac27cbac367bb2226772305f5877b8d5939b3a39d530cff756
font_01_sfnt_off0000eeda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEDA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000106ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106EC 17808 bytes
SHA-256: 658acfd6d2d992b33b67747b10e4f687cc6a815bf5979fb796186ac13cbd5385

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