Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecae42e68f37b5c0…

MALICIOUS

PDF

84.5 KB Created: 2021-10-20 07:30:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: ee83d9c6206977c2239ef72826d7a8a4 SHA-1: 979e830842c8ebdb2c61e4c0e0fb256d2abf5370 SHA-256: ecae42e68f37b5c0761c15a66df91bbdc95ead30c20b2b6f1b212c6a486c2d7d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://oniceh.ru/uplcv?utm_term=does+prednisone+help+you+work+out PDF link annotation
    • http://metrominicabs.com/survey/userfiles/files/madovareliwi.pdfIn PDF document text
    • http://chithanhplastics.com/uploads/userfiles/file/28076374831.pdfIn PDF document text
    • http://hrudolf.com/userfiles/87482273352.pdfIn PDF document text
    • http://aburobocon2019.mnb.mn/uploads/files/bubanebuxiraj.pdfIn PDF document text
    • http://agrobud.net/uploaded/file/82390507239.pdfIn PDF document text
    • https://yaslibakicisi.net/userfiles/file/nutadasoba.pdfIn PDF document text
    • http://midospa.com/upload/files/fivolosewe.pdfIn PDF document text
    • https://lotusmarinevn.com/upload/files/bafixigawijiderowu.pdfIn PDF document text
    • https://extractos.assaludips.com/Proyectos_PHP/gestor/images/file/dusifizazomazuredu.pdfIn PDF document text
    • https://aslimitada.com/userfiles/file/7530603072.pdfIn PDF document text
    • http://namlinhchivietnam.net/userfiles/image/file/xudedoxododem.pdfIn PDF document text
    • http://saothienemb.com/uploads/images/files/zudomanuvemilojidubadili.pdfIn PDF document text
    • https://ljlconst.com/admin/images/file/gogifuriwelexewevavav.pdfIn PDF document text
    • https://searchkar.com/ci/userfiles/files/mivupakulezu.pdfIn PDF document text
    • http://abwingsde.com/uploads/files/14733511395.pdfIn PDF document text
    • http://maudchristan.nl/ckfinder/userfiles/files/juvukasidoxo.pdfIn PDF document text
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613b1773b184b---zalofijezodofifoxena.pdfIn PDF document text
    • http://kompassztuki.pl/Image/files/11542094219.pdfIn PDF document text
    • http://agrocare.hu/ckfinder/userfiles/files/muvigitix.pdfIn PDF document text
    • https://branchennachweis.eu/userfiles/file/12305485678.pdfIn PDF document text
    • https://www.speeddating.lt/speeddating/ckfinder/userfiles/files/65166581365.pdfIn PDF document text
    • http://poliinc.com/upload/files/kiditufazilefafu.pdfIn PDF document text
    • http://linuxnewyork.com/draft/media/80354224561.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_off0000e92e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE92E 16612 bytes
SHA-256: abbc937e70ed30c0a836993591b24a94cb5e10d570461aa21c1ad83fcb64f1d0
font_01_sfnt_off0001135a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1135A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012b71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B71 10720 bytes
SHA-256: e19d275ff58a017616fdf38f66f85a91fe3dabf0742a1c1222410f8facae9b70

Open this report in the interactive analyzer, or submit your own file for analysis.