Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb253e138a7579ee…

MALICIOUS

PDF

129.1 KB Created: 2021-03-17 05:48:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 4a5c7fb8765ebd7bc8d7597905752c12 SHA-1: 265ad2a004da6e63ca76640349d2f00b9b468aa7 SHA-256: bb253e138a7579ee81c912f7df7ba12b24730e3cacf240cc6ce64005dea46eb8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, with one identified as malicious by ClamAV and ML classifiers. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, suggesting a phishing or malware distribution attempt. The presence of external URIs and the overall detection as 'Pdf.Phishing.Trojan' strongly suggest a malicious intent to lure users to compromised or malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://fokemale.ru/123?utm_term=hunter+x+hunter+bisky+true+form PDF link annotation
    • http://momijuluxesapek.iblogger.org/79869316176.pdfIn PDF document text
    • http://fewutame.getenjoyment.net/insurable_interest_in_marine_insurance.pdfIn PDF document text
    • http://zebozewazogaso.scienceontheweb.net/career_paths_vk.pdfIn PDF document text
    • http://satumatajug.iblogger.org/zimedox.pdfIn PDF document text
    • https://cdn.sqhk.co/sunaxidida/U2ghXgd/vetolizimigugenitamodolef.pdfIn PDF document text
    • https://cdn.sqhk.co/minamojazi/Npgrrid/todo_list_react_redux_tutorial.pdfIn PDF document text
    • http://xatovapotogu.mywebcommunity.org/cuales_son_los_sintomas_cuando_se_le_baja_el_azucar.pdfIn PDF document text
    • https://cdn.sqhk.co/zopizote/vje3R9r/snake_3d_model_stl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://uploads.strikinglycdn.com/files/b17ba1a0-a8b5-4299-9d03-4c2b931e10f7/wonderwall_projector_review.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/rurekidawulabu.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/comfort_sentry_thermostat_programming.pdfIn PDF document text
    • http://sapataxetawot.epizy.com/81408141678.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/biggie_smalls_one_more_chance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30563664-e1af-404c-8dd3-5ce758ec39ad/45841141244.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37b02604-4427-4fbe-8866-6b44c977c75c/focus_daniel_goleman_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c41f65d-52d7-4b68-8a53-0285cca8f96c/15608572296.pdfIn PDF document text
    • https://s3.amazonaws.com/mokamoba/holiday_office_party_flyer_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sefiwegegagu/canon_digital_photo_professional_software.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56d0e20f-1676-47dc-9653-ed08aeb6c3cf/ganibasamamugafekanezazax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f4dc18e-eeaa-484e-8e85-fd7099040b77/tudadukelibubasanigofulat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee783a6e-dd36-4dda-9043-04a5cf98b56d/what_is_the_easiest_pattern_to_sew_and_why.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://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015788.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15788 14464 bytes
SHA-256: d73dd0336eb50b4694350990806703ca4113ab0864e9d77cc7af3e0db31cdb90
font_01_sfnt_off00018603.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18603 5100 bytes
SHA-256: 2d00c68a203a7fd98821242148f756eae672c684fb6c4b7c20d1ab4c7d2e63d8
font_02_sfnt_off00019733.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19733 7580 bytes
SHA-256: f991510296706153fb45a2ae2ec375d15997ad28f47c1229e1bc182ed11b3c85
font_03_sfnt_off0001ac0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AC0F 15876 bytes
SHA-256: 66eece722e955a72dc030f553146d3206841b05cf4571ea966fc9888d0e70c86
font_04_sfnt_off0001dc85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DC85 17624 bytes
SHA-256: 819de69d036cc5a3c5475f5965bb69326226c413f1360642fa57103c9c2e29a8

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