Malicious PDF — malware analysis report

Static analysis result for SHA-256 334c0949b9218ff6…

MALICIOUS

PDF

85.6 KB Created: 2021-09-16 19:37:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 6d0a65bc47d5333d5a6e3adacd16db56 SHA-1: 118fda2fda8baadd105f7997ec7c09f4f6bc56dc SHA-256: 334c0949b9218ff647ac23df5d2613ae91e580d38f5618fa0322d1527e2375de
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, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or redirection scheme. The PDF structure and embedded URLs point towards an attempt to trick users into visiting malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 https://chcial.ru/uplcv?utm_term=after+we+collided+full+movie+free+gomovies PDF link annotation
    • http://sevenseahotel.com/uploads/images/files/zuxaje.pdfIn PDF document text
    • https://macjiboter.macjahisa.si/files/file/fisuwogok.pdfIn PDF document text
    • http://www.enredmail.com/templates/files/idCliente_/file/kebaxiw.pdfIn PDF document text
    • https://ceccarmaramures.ro/userfiles/file/85431947601.pdfIn PDF document text
    • http://lizhechem.com/upload/files/22074404889.pdfIn PDF document text
    • http://topenglish.sk/app/webroot/gallery/files/bebufadin.pdfIn PDF document text
    • https://forumsevens.com/images/file/26277484636.pdfIn PDF document text
    • http://xn--b1adbbbaeqjtsflbfms0e.xn--p1ai/pict/file/73283315723.pdfIn PDF document text
    • http://happyhanool.com/ckupload/files/27196852978.pdfIn PDF document text
    • https://marwaservicecenter.com/nbloom/fckuploads/file/30643036694.pdfIn PDF document text
    • https://kuni.ro/app/webroot/files/userfiles/files/werademodifowufofar.pdfIn PDF document text
    • http://schokoladenbrunnen.de/idata/taputexaxusudodanelekelaw.pdfIn PDF document text
    • http://citysoupsbellevue.com/uploads/files/79692000866.pdfIn PDF document text
    • http://www.southpointinstitutehowrah.com/admin/uploads/file/vopipigigafezuzirozala.pdfIn PDF document text
    • https://happycolaborativo.com/uploads/files/mesopoluveb.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16136ffe6cafe6---58271102738.pdfIn PDF document text
    • https://btsis.com/upload/ckfinder/files/nixexapo.pdfIn PDF document text
    • http://www.pilartangguh.com/file/38232102122.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/nses2r3gs8bee4a89qddh1pcu1/90233078986.pdfIn PDF document text
    • http://mweb.cz/images/file/sazovotinefuwum.pdfIn PDF document text
    • http://bualuang101.com/backoffice/upload/files/56263847539.pdfIn PDF document text
    • http://bsa.by/ckfinder/userfiles/files/tisapolaremoniba.pdfIn PDF document text
    • http://mnarch.it/userfiles/files/27382789571.pdfIn PDF document text
    • http://vividconcept.in/userfiles/file/53008962249.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_off0000e565.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE565 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fd77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD77 19100 bytes
SHA-256: e3e80affda89e7b68623f99e269bd023ef6e10051a67645bcdfb33e6f4e640b9
font_02_sfnt_off00012fb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FB5 10788 bytes
SHA-256: 523d7ba1f6923e74f4bd556f2671ea22edea50ea6ce65e62c3f62232d545c50b