Malicious PDF — malware analysis report

Static analysis result for SHA-256 e01807fb6f68b4d1…

MALICIOUS

PDF

81.7 KB Created: 2021-09-16 21:56:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: e5a0f428943f3ec47f01e6e80cb81f7a SHA-1: f1f2393b33990b80835364b7b7369728ac520f26 SHA-256: e01807fb6f68b4d1d583b8578841af01ac85fb89317e7e733fb999315a934e72
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The presence of numerous external links, some with UTM parameters suggesting tracking, and a heuristic firing for a 'download button' lure indicate a phishing or social engineering attempt. The primary external URI points to a URL that appears to be a download lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • 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.
  • 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://pixomot.ru/uplcv?utm_term=necrophonic+app+apk PDF link annotation
    • https://abrasco.org.br/ckfinder/userfiles/files/dunagudokinoganor.pdfIn PDF document text
    • http://tygodnikzuzlowy.pl/ckfinder/userfiles/files/ronex.pdfIn PDF document text
    • https://icbacademy.com/upload/files/rarumuwaf.pdfIn PDF document text
    • https://ashleymongolia.mn/uploads/files/linixateritenekunel.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/161377f6831746---volaxedazit.pdfIn PDF document text
    • https://daquin-ferriere.fr/userfiles/file/7173733771.pdfIn PDF document text
    • https://trexanh.net/upload/files/taxolojika.pdfIn PDF document text
    • http://lactopad.com/uploads/files/tarofozopaxij.pdfIn PDF document text
    • https://peltonfell.org.uk/ckfinder/userfiles/files/sovimatavenenevodezujoku.pdfIn PDF document text
    • http://carzip.biz/files/uploads/files/39220137418.pdfIn PDF document text
    • http://mrspk.com/ckfinder/userfiles/files/bugofumelowon.pdfIn PDF document text
    • http://budaors.varosom.hu/userfiles/files/88565798198.pdfIn PDF document text
    • http://fotostudiovaccari.it/userfiles/files/zipajuxujet.pdfIn PDF document text
    • http://www.badischer-kunstverein.de/ckfinder/userfiles/files/mewel.pdfIn PDF document text
    • http://gpe-el.pro/ckfinder/userfiles/files/50587672344.pdfIn PDF document text
    • http://otelm4b.ru/admin/ckfinder/userfiles/files/jinakekoxujolino.pdfIn PDF document text
    • http://freeorden.com/media/file/wugufafenazezetul.pdfIn PDF document text
    • https://helices-evra.com/userfiles/file/13888426401.pdfIn PDF document text
    • https://kclandscapes.com/ckfinder/triplebuserfiles/file/24966405517.pdfIn PDF document text
    • https://wickedcheesy.com/images/file/xasereb.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/d128f341e2944edc12073c9aa091e903/jipejakim.pdfIn PDF document text
    • http://zehanbiopharma.com/upload/files/japoxorixosejunulos.pdfIn PDF document text
    • https://pianoinprimopianofestival.com/uploads/file/dasamaratipukenabikita.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://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_off0000de31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE31 10228 bytes
SHA-256: a4afdb60b942a0a6f9cdadbc127323b7e76b966673b72bd145b8767706425e93
font_01_sfnt_off0000f50c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF50C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010d1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D1E 18708 bytes
SHA-256: 7f39eca59ea7b2f2aeee25689d7a1a07d4563088358260d68473a01c984b18d8

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