Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7cc3de565501064…

MALICIOUS

PDF

83.8 KB Created: 2021-03-01 13:50:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 11e5cb32bbe9e178f83e38410d0d35b9 SHA-1: 7f7ca0c7d229531f2ed77724290b44d3562ea796 SHA-256: b7cc3de5655010643af545c151c89dc2843099d6a561e08ac967f1dcc58ca38f
126 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and is flagged by multiple heuristics, including ML and ClamAV, as malicious. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicates a high number of links on disposable hosting, suggesting a phishing or malware distribution scheme. The primary URL, 'https://lozipotod.ru/strik?utm_term=why+is+chlorophyll+the+most+important+pigment', is likely used to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://lozipotod.ru/strik?utm_term=why+is+chlorophyll+the+most+important+pigment PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4447079/normal_6038b9103d01f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444877/normal_5fd31cbaa8ac6.pdfIn PDF document text
    • http://riniwodifole.medianewsonline.com/how_to_repair_pressure_washer_turbo_nozzle.pdfIn PDF document text
    • http://cardio-active.site/fsr_pressure_sensor_datasheet4ckqp.pdfIn PDF document text
    • https://cdn.sqhk.co/zokelofid/q6aNJhd/free_study_skills_worksheets_for_high_school_students.pdfIn PDF document text
    • http://subumobo.22web.org/car_rental_contract_template_uk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424364/normal_5fcbe6519ce7d.pdfIn PDF document text
    • http://rezltml.xyz/8307584122bkhyn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488133/normal_5fe62f3fc0625.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366000/normal_6001ced68957c.pdfIn PDF document text
    • http://kimokabif.medianewsonline.com/john_dewey_educational_philosophy_ppt.pdfIn PDF document text
    • http://pollsexpert.com/55735373312q1yin.pdfIn PDF document text
    • http://drenajkrasnodar.ru/89849608344i6lw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481985/normal_601e72db61404.pdfIn PDF document text
    • http://kamikofonem.mygamesonline.org/how_energy_efficient_is_an_electric_fireplace.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414501/normal_5ff17890c79d6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rexerutagid.epizy.com/operating_system_for_gaming_pc_reddit.pdfIn PDF document text
    • http://suwulinivez.rf.gd/pinugiwuwojusaxixudex.pdfIn PDF document text
    • http://xomapagovujux.atwebpages.com/how_to_charge_nikon_coolpix_s3100.pdfIn PDF document text
    • http://nipobotigopimon.rf.gd/1235333317.pdfIn PDF document text
    • http://xujekapowizi.epizy.com/4943979828.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_off0000f00f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF00F 5464 bytes
SHA-256: 154dc00cc346fe2f53610a541463a8a2ddf99d2700d483374a041dbc02f0cd19
font_01_sfnt_off0001028f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1028F 12348 bytes
SHA-256: b37c739fd4fc9d8c028a88559136f35a8e8e7584feb253378c49d16bbd180a15
font_02_sfnt_off00012c06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C06 16100 bytes
SHA-256: dfdc6983d3c42b81f9741fa6cdceaab3e97c1fbda00e6274acf933e6ff911e94

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