Malicious PDF — malware analysis report

Static analysis result for SHA-256 751392339fe41570…

MALICIOUS

PDF

77.2 KB Created: 2021-02-28 05:15:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4a617ed32cee26aa261d49796ba5c43c SHA-1: 97a7bddc08aee67f0fa5c556694097c834135c40 SHA-256: 751392339fe41570638c01448841ae8d4141066f3973e5328f8d25d5c9f19f4d
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/wix?keyword=new+richmond+soccer+association+ohio PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4366063/normal_6008f882b7ad2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367310/normal_5fd6a63247319.pdfIn PDF document text
    • http://kixiwogazu.sportsontheweb.net/do_functions_have_derivatives.pdfIn PDF document text
    • http://faxusupovetek.sportsontheweb.net/is_there_a_romeo_and_juliet_law_in_new_york.pdfIn PDF document text
    • https://vatedubajepe.weebly.com/uploads/1/3/4/3/134371970/vokofazaz.pdfIn PDF document text
    • https://tatabano.weebly.com/uploads/1/3/4/8/134850833/9126003.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465144/normal_60186c24ceb44.pdfIn PDF document text
    • https://jesasifewom.weebly.com/uploads/1/3/1/4/131453969/6067992.pdfIn PDF document text
    • http://bisibometixo.mywebcommunity.org/2012_sonata_2.4_oil_capacity.pdfIn PDF document text
    • https://cdn.sqhk.co/rusobotakox/hkI3ihu/minecraft_ben_10_vanilla_mod_v2_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488322/normal_5ff40e6ba17a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406191/normal_601dd8953c643.pdfIn PDF document text
    • http://tefitagesev.mypressonline.com/the_100_book_chapter_1_summary.pdfIn PDF document text
    • https://votaxejasusax.weebly.com/uploads/1/3/0/9/130969278/3649e19024bac8c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nisetekotixob.myartsonline.com/700x_load_data_for_380_acp.pdfIn PDF document text
    • http://tavoxelelenasi.onlinewebshop.net/water_flosser_for_teeth.pdfIn PDF document text
    • http://xovolefewawex.atwebpages.com/jafadon.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f11b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF11B 5208 bytes
SHA-256: 31501f4c75e051d56d3f7e18a6ad10181cb5ebdbbd8faf439defa45318782968
font_01_sfnt_off000102b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B7 10708 bytes
SHA-256: 26af714cc81ebeaddaba93686f6fb99d5e1981a96aab7740e5583e801273d191