Malicious PDF — malware analysis report

Static analysis result for SHA-256 222de3430f9bb2b9…

MALICIOUS

PDF

89.5 KB Created: 2021-04-27 03:06:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 5c7303bf4ec6feda4e0cb19223636dee SHA-1: 02b16a2927714c5f95147113a21cc83c06162e9b SHA-256: 222de3430f9bb2b94f8914dda913363a67d00622d79216716431d2b3c2f63f12
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure strongly suggest an attempt to distribute malware or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jumiwimov.ru/strik?utm_term=is+wheat+free+diet+healthy PDF link annotation
    • https://cdn.sqhk.co/libabafo/igiijfE/ritozawowusosefaruzuxe.pdfIn PDF document text
    • http://fosireditoj.mygamesonline.org/29433259504.pdfIn PDF document text
    • http://kefudepoduwudi.sportsontheweb.net/dakaxepitodufifexaror.pdfIn PDF document text
    • http://tuwukadinem.mygamesonline.org/57766755560.pdfIn PDF document text
    • https://cdn.sqhk.co/xesofosirija/XB1Pojh/ayushman_yojana_online_application_form.pdfIn PDF document text
    • http://wafolepis.iblogger.org/se_puede_llevar_cafe_en_el_equipaje_a_estados_unidos.pdfIn PDF document text
    • http://gonifarej.mywebcommunity.org/romeo_juliet_telugu_movie_songs_download.pdfIn PDF document text
    • https://cdn.sqhk.co/sunomedude/jhoibIO/idle_tycoon_space_company_wiki.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwolupenilu/giqgdje/malayalam_songs_80_90_youtube.pdfIn PDF document text
    • https://cdn.sqhk.co/zexukobesu/TigTgiu/class_8_maths_syllabus_cbse_2018.pdfIn PDF document text
    • http://solusaxisabo.scienceontheweb.net/also_sprach_zarathustra_deodato.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wajodojizofe.epizy.com/15953621752.pdfIn PDF document text
    • http://kivarutumo.myartsonline.com/barron_s_gre_math_book.pdfIn PDF document text
    • https://968bac2e-1409-45a7-bd11-2c37eba47390.filesusr.com/ugd/c81504_135b7bd1934c4582b802d272c18383b0.pdf?index=trueIn PDF document text
    • https://c7972686-9310-4d97-8ac3-15e828887225.filesusr.com/ugd/8a419d_f4721eca8a154f12b340843f9489b217.pdf?index=trueIn PDF document text
    • https://d17f4099-ecc1-42b1-9c73-51521793457c.filesusr.com/ugd/4a2613_de741d57a77940f8a26d19b9e18be523.pdf?index=trueIn PDF document text
    • https://37459de8-d961-4a2a-897a-801dad55dcfc.filesusr.com/ugd/1395e2_b1d21bc499564d82a73ced3282bd9eca.pdf?index=trueIn PDF document text
    • http://fejonaxi.myartsonline.com/pan_africanism_movement.pdfIn PDF document text
    • https://df867d32-629d-4b48-af14-2fc5df20f827.filesusr.com/ugd/287761_c4582f1008714200bdac2d73cb8467cf.pdf?index=trueIn PDF document text
    • https://2225f16e-b6a0-48e2-a067-d7e802b71dd4.filesusr.com/ugd/a7ada4_b060dd159223455981d492e8ea059b3d.pdf?index=trueIn PDF document text
    • https://0e8f88b9-656e-4b05-9cd8-8bd477f85547.filesusr.com/ugd/95b9ea_34e132cc27d447a1a5e0ebcdf6d3d568.pdf?index=trueIn PDF document text
    • https://7ed754b6-a209-4558-9281-0032c7ee8ade.filesusr.com/ugd/4329d7_810fcfa1701b48a6acfd1a50bf69d5e5.pdf?index=trueIn PDF document text
    • http://bideliv.rf.gd/biology_dictionary_english_to_gujarati_free_download_app.pdfIn PDF document text
    • https://26577e91-18e8-42c3-8e85-49dcca1d6605.filesusr.com/ugd/195787_9fe0113dd9cb4d78a516177bf92e4a44.pdf?index=trueIn PDF document text
    • https://8b7199fc-a029-4910-8138-caee300d1cbd.filesusr.com/ugd/da8f68_be37ea83dfc04f4cb473c611491be7e8.pdf?index=trueIn 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://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_off00010ba1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BA1 5124 bytes
SHA-256: 7786749639f69a578ed5f4475c8c88006c31b850dc7addb122a5ca411651f47e
font_01_sfnt_off00011d22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D22 11504 bytes
SHA-256: c99fd6586df21cd190e68bfc59f965a2614a0b224f19cb38d27aeffa88b1766f
font_02_sfnt_off000142f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142F6 16060 bytes
SHA-256: 99ddc6f5858eb134f8024171ebe717cbd02485c31471b921a5021903b5272953

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