Malicious PDF — malware analysis report

Static analysis result for SHA-256 7548ed2313a42553…

MALICIOUS

PDF

73.0 KB Created: 2021-02-14 13:07:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 641aa08930d9d73747abc0e77a3a0660 SHA-1: 26600af07d13dcd6f334095204cc83fec8474a9b SHA-256: 7548ed2313a42553a66621c7611a2654ebc8315986783b6afcd7b99bc6cf45e3
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and is flagged by heuristics as a link farm and a potential phishing or malware distribution site. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to search terms, directing users to external sites.

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://bologen.ru/wix?keyword=george+of+mice+and+men+quotes PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4373511/normal_601756b3cdd74.pdfIn PDF document text
    • https://ladubikoniku.weebly.com/uploads/1/3/0/9/130969526/3928405.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493195/normal_5ffaa967a5aba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486971/normal_5ffc08f8241c8.pdfIn PDF document text
    • http://azakalaza3.xyz/hydrex_pink_spray_data_sheetz7t6i.pdfIn PDF document text
    • http://store50off.info/amazon_alexa_speaker_group_not_working17a6k.pdfIn PDF document text
    • https://satataro.weebly.com/uploads/1/3/5/3/135350270/jigamoma_kedef.pdfIn PDF document text
    • http://probmake12.xyz/annexure_1_form_for_ewsju2m9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492575/normal_5ff8d9cadf4a5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370319/normal_60010374b9b42.pdfIn PDF document text
    • https://zoseduzarososu.weebly.com/uploads/1/3/2/7/132740870/rufawe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/charam_sukh_web_series_free.pdfIn PDF document text
    • http://vogidide.epizy.com/management_discussion_and_analysis_report_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/definition_du_rendement_d_une_transformation_chimique.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/churchill_square_store_guide.pdfIn PDF document text
    • http://putiremupupunis.epizy.com/special_delivery_tracking_number_format.pdfIn PDF document text
    • http://pususarejopo.epizy.com/91493150424.pdfIn PDF document text
    • http://sebilazog.rf.gd/12453779299.pdfIn PDF document text
    • http://pifujisebakiju.epizy.com/i_found_love_cindy_s_song.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_off0000e160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE160 5464 bytes
SHA-256: cafd47563cca47c3878253880502b4ae7eba8ef2e6a4764aa779ba3ca789989d
font_01_sfnt_off0000f3df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3DF 10076 bytes
SHA-256: c43529d72a58ccfc5b311369a839e189cf0af2367cae9230224317242cb39e29

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