Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d420f75cee0d473…

MALICIOUS

PDF

108.0 KB Created: 2021-03-03 13:51:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 6c3901cd00afb046248abb40a1b187c4 SHA-1: 162e8fcb1541c3b8f73d089780ca091f6ee7c200 SHA-256: 0d420f75cee0d473d97fad9bea0ee0f0ca308150321ac2b17f6643fccd3e5063
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many pointing to disposable hosting and link farms, indicating a likely attempt to redirect users to malicious content or phishing sites. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious intent. No scripts were extracted, but the heuristic findings and URL analysis point towards a spearphishing attachment or a malicious link lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://leonvi.ru/wix?keyword=unitary+elastic+example+good PDF link annotation
    • https://pamigewome.weebly.com/uploads/1/3/4/6/134631685/kifuwukewa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450043/normal_5fd8339a94c9a.pdfIn PDF document text
    • http://fakexexu.sportsontheweb.net/ariens_st824_carb.pdfIn PDF document text
    • http://worabipupe.mypressonline.com/thermo_king_apu_codes.pdfIn PDF document text
    • https://bufuxilanu.weebly.com/uploads/1/3/4/4/134402831/mogobatipipo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473432/normal_5fee8ca80f357.pdfIn PDF document text
    • http://budokudepa.scienceontheweb.net/23325730795.pdfIn PDF document text
    • http://tixaman.scienceontheweb.net/how_to_install_deadpool_mod_gta_v_ps4.pdfIn PDF document text
    • https://tiwabegi.weebly.com/uploads/1/3/0/8/130874513/nimixijadewigo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489035/normal_5fd17e6350916.pdfIn PDF document text
    • http://kobujiva.iblogger.org/yakuza_kiwami_1_guide.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zowofiz.myartsonline.com/user_manual_for_samsung_gt-p3113.pdfIn PDF document text
    • http://pabewuvuxaf.onlinewebshop.net/96901573230.pdfIn PDF document text
    • http://winibivazizi.rf.gd/4116796706.pdfIn PDF document text
    • http://sasotogatajuxiw.rf.gd/origenes_del_neoliberalismo_en_mexico.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://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_off00015203.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15203 5552 bytes
SHA-256: e644de6bb88c506deccd9eab22290d89dc355f9b6c92eea0a239eb75232c0139
font_01_sfnt_off000164e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x164E3 11856 bytes
SHA-256: 59611e39d8bbbf45d827a1ea2a62ca3aa54db1345860d83e5ec2b16528f5d335
font_02_sfnt_off00018d79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18D79 16172 bytes
SHA-256: ec200c6dc9b46c23525cae078a8a7273006dcc3a26028d12eb696c831fd681fc

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