Malicious PDF — malware analysis report

Static analysis result for SHA-256 e380f37ddde3ec4b…

MALICIOUS

PDF

83.1 KB Created: 2021-10-05 12:15:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: d15450162d8efff369830764080d426e SHA-1: 7ef8ae17268ec8b26b035b6f2199062da44c5c67 SHA-256: e380f37ddde3ec4bbcb7131786d2339b1b8d0aad618ff546085d03cc98780605
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as a phishing trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous embedded URLs, many of which point to disposable domains and are structured as a link farm, a common tactic for distributing malware or conducting phishing campaigns. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external links suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://dailyliving.nl/ckfinder/userfiles/files/fizobu.pdf In PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/cdl7eh691ifo5s7g7lv5i3nvbq/jugeragafasevivoxidatut.pdfIn PDF document text
    • http://consorzio-csa.it/userfiles/files/jivixerumoge.pdfIn PDF document text
    • http://precisao.net/files/files/60251719948.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/16134cb19ee9b3---vibewowev.pdfIn PDF document text
    • https://bdata.vn/upload/files/74115674038.pdfIn PDF document text
    • http://www.vljainandco.com/userfiles/files/84656842368.pdfIn PDF document text
    • http://dogwarts.ru/sites/default/files/file/welenefigobuguturenabufad.pdfIn PDF document text
    • http://taxfreepoint.com/file/13513389123.pdfIn PDF document text
    • http://lidaoxc.com/upload/files/75989904651.pdfIn PDF document text
    • https://ferdavagnar.is/images/fck/file/pimipixixowanejipit.pdfIn PDF document text
    • https://ddmmaze.altruistictech.org/documents/img/upload/files/30391572525.pdfIn PDF document text
    • http://hrzservices.com/uploadfiles/file/sugesikuwalajejupabenetug.pdfIn PDF document text
    • http://avvocatoandreabruschi.it/userfiles/files/koxemajovanujege.pdfIn PDF document text
    • http://fulns.com/uploadfile/fckedit/file/1631531523eUjQ.pdfIn PDF document text
    • https://cancelaria.pl/galeria/file/fuvofaku.pdfIn PDF document text
    • https://ldoris.com/upfile/files/20210929042407.pdfIn PDF document text
    • http://debten.net/UserFiles/File/24630710013.pdfIn PDF document text
    • http://dachastyle.com/userfiles/file/51019158320.pdfIn PDF document text
    • https://njshore.drinkpoint.com/uploads/files/96189046460.pdfIn PDF document text
    • http://colafranceschi.it/userfiles/files/mukavuxanoliparologozo.pdfIn PDF document text
    • https://voziky-paletove.cz/mctree.cz/pictures/other/files/25295056836.pdfIn PDF document text
    • https://noithatkuongthinh.com/uploads/files/jibeferotiviwuvukepomazu.pdfIn PDF document text
    • http://proallprint.com/userfiles/files/33403222114.pdfIn PDF document text
    • http://jlm-kg.com/uploads/file/ditezuzubekepitozuxab.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=lupus+and+pulmonary+hypertensionPDF 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_off0000dc29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC29 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f440.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF440 10828 bytes
SHA-256: 2c6f1d5c168fdf149b22f80876546f6d3ab439a04c63d173f7e8c52a28c7d3bd
font_02_sfnt_off00010d01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D01 19140 bytes
SHA-256: 303b7b9b5be1bd399e9238fc979e6a8b6492cf23c9d2bc0bea10b86835bfce20