Malicious PDF — malware analysis report

Static analysis result for SHA-256 54020789bb7e39c7…

MALICIOUS

PDF

82.4 KB Created: 2021-09-08 18:56:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 10047843e1ad7b20e2038f9d869b4465 SHA-1: 673239dbfcbbbb56c81a740c98fe999c17598092 SHA-256: 54020789bb7e39c7e26ee6f3a46837e776c82018151f71e3652cf1077cf6aec5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm designed to obscure the ultimate destination. The PDF structure and embedded content suggest it is intended to redirect users to malicious sites, likely for phishing or malware distribution.

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 http://otvorene-srdce.sk/userfiles/file/97706339073.pdf In PDF document text
    • http://sin-hua.org/userfiles/73585716344.pdfIn PDF document text
    • http://verynailscm.com/user_img/file/bamafejotuvupogamexe.pdfIn PDF document text
    • http://mutamobilya.com/images_upload/files/49756409338.pdfIn PDF document text
    • https://birutelorasin.com/contents/files/zevaduku.pdfIn PDF document text
    • https://alistairmills.com/ckfinder/userfiles/files/68737186090.pdfIn PDF document text
    • http://www.eatvirukai.lt/uploads/files/vozujixofiwonakaseteb.pdfIn PDF document text
    • http://surveycook.com/upload/tmp/202109/file/fusedizixefa.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/chjjs4b054lrhkokd0qqmhoop8/nejorogus.pdfIn PDF document text
    • https://newtech-utm.pl/userfiles/file/vanijumovedemubusovemagi.pdfIn PDF document text
    • http://www.heksan.com.pl/file/forur.pdfIn PDF document text
    • http://ventmetal.ru/userfiles/files/80300178183.pdfIn PDF document text
    • https://gastrotest.co/ckfinder/userfiles/files/zoxenaxuzagimubagasijima.pdfIn PDF document text
    • http://abwvictory.com/uploads/files/gitekogukarojunegelimas.pdfIn PDF document text
    • https://ka-base.no/images_content/file/nisozikagejaretidasefomip.pdfIn PDF document text
    • http://moveworldtogether.com/datas/files/6147266927.pdfIn PDF document text
    • http://flashdisplay.net/UploadFiles/FCKeditor/20210905145505.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/161363919c8e4f---fuvixujasasanotifuvaz.pdfIn PDF document text
    • http://szzxwx.com/Upload/Upload/file/202194614556597.pdfIn PDF document text
    • https://motecx.com/images/file/nosetewib.pdfIn PDF document text
    • https://lifesmart.ro/ckfinder/userfiles/files/jemasigikogo.pdfIn PDF document text
    • https://nieruchomoscikomercyjne.co/files/file/rixumimelutodumovezuduru.pdfIn PDF document text
    • http://rambud.pl/uploaded/file/83794447223.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=lutheran+hymn+book+pdf+downloadPDF 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_off0000d9eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9EB 10992 bytes
SHA-256: 9d3ee33afd017457d69362e8e54839b5057dc4f4efb5d0ba51c3ab4b2fe28e9c
font_01_sfnt_off0000f31e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF31E 18728 bytes
SHA-256: 853d61a2b46597d04f2b1a01a3820ad5c565e6ec40901d7ab760d3667274d63a
font_02_sfnt_off00012400.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12400 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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