Malicious PDF — malware analysis report

Static analysis result for SHA-256 900570da5f463830…

MALICIOUS

PDF

79.1 KB Created: 2021-03-04 22:58:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: d70b00ba76a4e2167c02a8fafc425aaf SHA-1: 211892f00afb19b7b7a18de8835d6b65540a583f SHA-256: 900570da5f463830f0f0caac3c255126ba9fd0869893f81f3ee2e3501fba04b8
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL leading to a site offering 'hospital blankets for sale', suggesting a phishing or scam lure. The presence of PDF_URI and EMBEDDED_URL heuristics further supports the malicious intent of directing users to external, potentially harmful, web content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://botokaw.ru/wix?keyword=hospital+blankets+for+sale PDF link annotation
    • http://helpcontactform.com/aggregate_planning_is_capacity_planning_forubw6d.pdfIn PDF document text
    • http://fruktovik.com/redcat_racing_tornado_epx_pro_partsnz774.pdfIn PDF document text
    • http://rowomonug.mywebcommunity.org/what_does_taco_bell_mild_sauce_taste_like.pdfIn PDF document text
    • https://cdn.sqhk.co/sarunasol/MieT9eS/knock_down_texture_repair.pdfIn PDF document text
    • http://omerkatanalp.com/kijivedomaaz2jb.pdfIn PDF document text
    • http://worldworkbook.com/pepolerabiwafuzgknw8.pdfIn PDF document text
    • https://cdn.sqhk.co/javeduner/5hcggge/project_manager_job_indeed.pdfIn PDF document text
    • https://cdn.sqhk.co/xurajalijok/giJYRJr/download_game_overdrive_premium_mod.pdfIn PDF document text
    • http://galosidijixiwu.mypressonline.com/juzike.pdfIn PDF document text
    • http://davupopebuwiser.sportsontheweb.net/83939735905.pdfIn PDF document text
    • http://nafarami.medianewsonline.com/14330785875.pdfIn PDF document text
    • http://usacreditreport.info/dishonored_2_well_funded_trophy_guidevqq4i.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a9864912-ad24-422b-99f3-2d90f7703507.filesusr.com/ugd/d6af85_e76d9888489a48789a39be4f0eb79104.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/ramogirovipurovesojo.pdfIn PDF document text
    • https://7d6e376e-1ee3-4df5-88c1-8d1511d419f8.filesusr.com/ugd/7dd30d_aa63f4b06c064b989eaa3d7f49bc1892.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bipepezuwed/levogi.pdfIn PDF document text
    • http://zowofiz.myartsonline.com/honeywell_focuspro_6000_factory_reset.pdfIn PDF document text
    • https://s3.amazonaws.com/gapuruxumeg/44355464734.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/metabolomics_journal_author_guidelines.pdfIn PDF document text
    • https://171e2b11-24ea-4535-acac-f971ec821c4b.filesusr.com/ugd/a07927_45e0312d787f4f8ca1f29d6da6c3094f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c69ee6a5-df2e-4032-afec-66c778c3c1ec/567964308.pdfIn PDF document text
    • https://s3.amazonaws.com/fusidejebi/net_framework_2._0_sdk_vcbuild._exe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/466519ec-f5e5-4858-b6a5-496bfb3f5912/gebajariti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51a2bd17-8a6c-4616-82d2-d4530facae64/14524167438.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72bc0171-000e-4d67-9526-68abea001611/97898965510.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_off0000f9cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CB 5060 bytes
SHA-256: dd70d4104cad68b60ffce749702d3c8206df8eec9fe7e86d739271f1922e6838
font_01_sfnt_off00010b08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B08 10580 bytes
SHA-256: 0eaab1170788fcfd591214f490b14b7db965a29c7ac22a662be884b2127f5e3d

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