Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd5d64e903bbf9d4…

MALICIOUS

PDF

90.0 KB Created: 2021-10-06 04:36:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 3375946c4695915aba6ca36e7dfd9fae SHA-1: c1867211cf066016e45d50969203364bc8af7829 SHA-256: dd5d64e903bbf9d4480d669ce5b1f3c5dc298867a3fa5941bd4edddace64f12c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to suspicious domains and are likely used to redirect users to malicious content or phishing pages. The PDF structure and the presence of external URIs suggest an attempt to lead the user away from the document itself, possibly to download further payloads or engage in credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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://securitydm.net/slicice/file/20743095376.pdf In PDF document text
    • http://tearose-kitchen.com/sites/default/files/images/imcefile/55823568098.pdfIn PDF document text
    • https://sindicav.com.br/ckeditor/ckfinder/userfiles/files/xufimijawabux.pdfIn PDF document text
    • http://ekonopuntos.com/campannas/file/tupomuwabutabofazawe.pdfIn PDF document text
    • http://balade-pierry.fr/userfiles/file/jepelaxoro.pdfIn PDF document text
    • http://agrobud.net/uploaded/file/mazani.pdfIn PDF document text
    • https://habrit.tw/ckfinder/userfiles/files/dajejijaritelolaros.pdfIn PDF document text
    • http://gimhaejazz.com/fckeditor/userfiles/image/40752084457.pdfIn PDF document text
    • http://instant-image.net/UserFiles/Site/File/pojukuroziliwub.pdfIn PDF document text
    • https://hojoairport.com/images/file/10910285533.pdfIn PDF document text
    • http://diegogenna.it/userfiles/files/xurofo.pdfIn PDF document text
    • http://immodraft.de/images/architekten_agentur_images_/file/60144974442.pdfIn PDF document text
    • http://benrassam.com/uploads/files/zupipitesavaranuma.pdfIn PDF document text
    • http://tiquital.com/documentos/file/68460451757.pdfIn PDF document text
    • https://profix.fr/ckfinder/userfiles/files/bigubuzojilubedarar.pdfIn PDF document text
    • https://cepatdaftargroup2.com/contents/files/nonowevogax.pdfIn PDF document text
    • http://trungtamsangloc.vn/uploads/ck_upload/files/lezukofatelerapoxol.pdfIn PDF document text
    • http://sadvita.lt/pav/file/17178434897.pdfIn PDF document text
    • http://1careglobal.com/upload/files/lutukij.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1614c1c2f17404---53427976033.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/02d735a3ef4a7f235ceee19fced1a7f4/51849106252.pdfIn PDF document text
    • http://zhatuogz.com/uploadfile/file/22244721902.pdfIn PDF document text
    • https://labelmarket.eu/data/file/pixofexeganimekametofup.pdfIn PDF document text
    • https://naves.cz/res/file/51142450132.pdfIn PDF document text
    • https://banerjeetourspecial.in/ckfinder/userfiles/files/fesirenavirozudowofonas.pdfIn PDF document text
    • http://3xlove.com/uploadfile/file/sabemasivafinogiz.pdfIn PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/85766800034.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=work+is+worship+meaning+in+tamilPDF 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_off0000f353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF353 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010b65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B65 20648 bytes
SHA-256: 0542cef60e26a718d307d669e08bd2681c4894fe4f583614582c4e88357954d6
font_02_sfnt_off000140d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140D9 10872 bytes
SHA-256: eda24c96733570cf997e9e10e3df117273fc69d5eed8d6d9392e87c32523b885