Malicious PDF — malware analysis report

Static analysis result for SHA-256 802ebc436d66491c…

MALICIOUS

PDF

80.0 KB Created: 2021-09-21 03:51:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 4396a9f7cbb9606adb64597816cf7ce3 SHA-1: e3620e029aaaa074da17ad9d641240a745538f11 SHA-256: 802ebc436d66491c9a795683102907f0dfb05644f57bb7fb6fd6908860b86882
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are consistent with a malicious PDF used as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 6

  • 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.
  • 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://drafthe.ru/uplcv?utm_term=moviesda+app+apk+download PDF link annotation
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a6994a9687---19200105591.pdfIn PDF document text
    • http://rilta.net/userfiles/files/gujuwirakuxapegitukafe.pdfIn PDF document text
    • https://mokshadhamnepal.org/userfiles/files/piwadokero.pdfIn PDF document text
    • http://nuklearmedizin-amro.de/userfiles/file/vulobidalivoduvokovimam.pdfIn PDF document text
    • https://ecodiagnost.com/ckfinder/userfiles/files/72353207067.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613940b9677b3---78201521400.pdfIn PDF document text
    • http://coca-colalife.eu/userfiles/file/mixuniwuvonugejab.pdfIn PDF document text
    • https://adikkedua.com/contents/files/lotobixafid.pdfIn PDF document text
    • https://hashtag.school/userfiles/file/64434926750.pdfIn PDF document text
    • https://tumsad.org/img/editor/image/file/1763725089.pdfIn PDF document text
    • http://parfumerieindex.nl/images/uploads/57646686525.pdfIn PDF document text
    • http://446888.top/userfiles/file/98753119025.pdfIn PDF document text
    • http://ordineveterinarivenezia.eu/userfiles/files/devumuwimuturinagoba.pdfIn PDF document text
    • http://villahetzwartepaard.nl/survey/userfiles/files/davezoropa.pdfIn PDF document text
    • http://massimobertoarchitetto.com/userfiles/files/kupunovuzamexozemukigimoz.pdfIn PDF document text
    • http://camara.acessoainformacao.org/uploads/ckfinder/files/5812378433.pdfIn PDF document text
    • https://rdsdealers.com/ckfinder/userfiles/files/59099540928.pdfIn PDF document text
    • http://areaengineeringsrl.eu/userfiles/files/65153232125.pdfIn PDF document text
    • http://hbaoge.com/upload/files/65701026698.pdfIn PDF document text
    • http://www.guus.edu.mn/ckfinder/userfiles/files/govegedenugovubegabugur.pdfIn PDF document text
    • https://sharks-cz.cz/images/file/vitaku.pdfIn PDF document text
    • https://ww150001.linebot.net/upfile/files/20210911041524.pdfIn PDF document text
    • http://czernavendeghaz.hu/admin1/file/sekazedopogis.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161319b176a89b---81269931267.pdfIn PDF document text
    • https://loppisidjupdalen.se/images/uploaded/file/34258332968.pdfIn PDF document text
    • http://dachastyle.com/userfiles/file/23127356603.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_off0000d6b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B2 10424 bytes
SHA-256: 199befbc5e2791b4f0bb1d740b17ff3b9c81bce6fb3e058d8d539ec64fbfee48
font_01_sfnt_off0000ee81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE81 17084 bytes
SHA-256: 113f8820979e9b211b6946e694488e8328f1a8ec22752d5f99474d5ceb06beac
font_02_sfnt_off00011a5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A5F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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