Malicious PDF — malware analysis report

Static analysis result for SHA-256 14dc8bbdcc39eefd…

MALICIOUS

PDF

76.3 KB Created: 2021-09-13 04:05:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 662b4f05c54446d83eda886f6891eabb SHA-1: 139fe442d473e5c1ab914a7ae4a8c9e6f2aaaf5c SHA-256: 14dc8bbdcc39eefde0ba13f5906c1d5d865cd3449d1bef980ff1708d91852a13
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to suspicious domains and are structured to appear as download links, with one specifically mentioning 'download life360 apk'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for multiple links, further suggesting a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 5

  • 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.
  • 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 http://di-tech.kr/fckeditor/userfiles/file/zorusugexepinenusizotoke.pdf In PDF document text
    • https://alixdemassy.fr/userfiles/file/88468538962.pdfIn PDF document text
    • http://gioiacompany.net/images/upload/file/wufiguwezafikopep.pdfIn PDF document text
    • http://riggi.ru/userfiles/file/24333302905.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/161398af4cd1a0---vazap.pdfIn PDF document text
    • http://sevenseahotel.com/uploads/images/files/23127197363.pdfIn PDF document text
    • http://dragoniresorts.com/userfiles/74947920060.pdfIn PDF document text
    • http://somkuthyoptika.hu/editor_up/67722174169.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/161347ddd5ce06---bagebuvimedod.pdfIn PDF document text
    • http://netcentricnj.com/ckfinder/userfiles/files/xomudeno.pdfIn PDF document text
    • https://webtechnocrats.com/upload/file/kelilolaxeduxade.pdfIn PDF document text
    • http://wawa757.com/uploads/files/76389810019.pdfIn PDF document text
    • https://skiclubraonbaccarat.fr/pdf/bopuzegusufi.pdfIn PDF document text
    • https://behbehaniprojects.com/uploads/files/muxefamekudu.pdfIn PDF document text
    • http://www.fan-consultants.com.tw/ezadmin/ckfinder/userfiles/files/88303638297.pdfIn PDF document text
    • http://fiumaradelsossio.it/userfiles/files/fekuwapojifigafide.pdfIn PDF document text
    • https://mimpishiodua.com/contents/files/wuxegatemekofagofo.pdfIn PDF document text
    • http://tjsyjdq.com/v15/Upload/file/202198324113341.pdfIn PDF document text
    • http://elitaliaweb.it/upload/file/bisodedinigemupigobibikus.pdfIn PDF document text
    • https://mobile-translator.eu/app/webroot/media/files/fifowuxefemaritonife.pdfIn PDF document text
    • http://unibeauty.com.br/ckfinder/userfiles/files/21102421925.pdfIn PDF document text
    • http://rebizplus.com/userfiles/file/jevez.pdfIn PDF document text
    • http://exosportsante.fr/ckfinder/userfiles/files/nuboxefanebozideve.pdfIn PDF document text
    • http://mispuntossaga.com/campannas/file/bowuxul.pdfIn PDF document text
    • https://motoralbini.it/files/file/xigofuxubetetasoj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=download+life360+apkPDF link annotation
    • 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_off0000c4c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4C4 10764 bytes
SHA-256: 3a302f4cd46786d967d1865ecbe0e56f5156e8eb0c9f7037805f4c4c76948ee6
font_01_sfnt_off0000ddaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDAA 17712 bytes
SHA-256: d73ccd417617edf6a81d69a158516a265ad9bc555651e70eedda61fe9fcad5e9
font_02_sfnt_off00010b64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B64 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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