Malicious PDF — malware analysis report

Static analysis result for SHA-256 30507f6158ddb9f3…

MALICIOUS

PDF

83.5 KB Created: 2021-04-04 08:07:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 8e08d9131e152ae17b8172995e41fe3d SHA-1: 21ece4703573cbf3a6d9d5794277d3df9b6abee9 SHA-256: 30507f6158ddb9f3284dd14c4aa4d55a514f91dd6e7db865995f413790b58b80
126 Risk Score

Malware Insights

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

The PDF contains embedded URLs that redirect to potentially malicious domains, masquerading as allergy information. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to external sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://jottigo.ru/123?utm_term=costco+cake+allergy+information PDF link annotation
    • https://cdn.sqhk.co/leporolino/0DGyggz/kafiwoninojap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447646/normal_605682254194e.pdfIn PDF document text
    • https://cdn.sqhk.co/jojikoxazew/flic4iz/18776916496.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383579/normal_5fed9ecb5d985.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454306/normal_601b6ffa83bfe.pdfIn PDF document text
    • http://noxivivixuza.22web.org/ipmn_fukuoka_guidelines.pdfIn PDF document text
    • http://naropiwazufilu.22web.org/69995712362.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459917/normal_60153fca90f2b.pdfIn PDF document text
    • http://vemonubamupol.iblogger.org/modern_analytical_techniques_in_food_analysis.pdfIn PDF document text
    • http://kuxufijum.iblogger.org/dinidaxasop.pdfIn PDF document text
    • https://cdn.sqhk.co/dubibuwa/gohgieh/dragonvale_breeding_cave_upgrade_price.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483097/normal_6048cc81b3857.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/pegek/vibodimu.pdfIn PDF document text
    • http://zoxizagujaniru.epizy.com/96481697214.pdfIn PDF document text
    • http://laburebimefifal.epizy.com/what_can_my_5000_watt_generator_run.pdfIn PDF document text
    • http://robowogutalopet.epizy.com/seguferevesovaroviwu.pdfIn PDF document text
    • http://pojevit.rf.gd/mathematical_logical_questions_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/bisute/august_2019_calendar_printable.pdfIn PDF document text
    • http://dosevidi.rf.gd/bayonetta_2_switch.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/pitixonufujuzekuxunitixik.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/resumen_conde_lucanor_por_cuentos.pdfIn PDF document text
    • http://labubesasowil.epizy.com/1309403109.pdfIn PDF document text
    • http://refiwamidur.rf.gd/14820808213.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fb1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB1E 5180 bytes
SHA-256: 925843104332d0946243ae83ad062fe2d82da59d2e8cd435a711086fba916ef4
font_01_sfnt_off00010ca8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CA8 11132 bytes
SHA-256: 4ed6ef29e011bc378b548cfe4eece259e40377a2a309353fca35e402d3cb740f
font_02_sfnt_off00013276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13276 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34