Malicious PDF — malware analysis report

Static analysis result for SHA-256 bed14f5070af5e6f…

MALICIOUS

PDF

74.5 KB Created: 2021-03-07 05:45:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 43811911616f0fa09e53675b59e317af SHA-1: fb1278a4c589490d6329286c5d4dc1219138a8a5 SHA-256: bed14f5070af5e6fd33cf66f76cca0895fdc0019658ffde35e38d3ed3d69a582
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The presence of numerous embedded URLs, one of which points to 'jumiwimov.ru', suggests a phishing or malware distribution attempt. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic further supports this by indicating the PDF acts as a link farm on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://jumiwimov.ru/wix?keyword=the+testing+short+summary PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416318/normal_6038e71c1eebc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369633/normal_5fe2c5196e316.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384468/normal_6025b4cba8bfb.pdfIn PDF document text
    • http://ratubave.22web.org/adverbs_of_place_and_time.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421944/normal_6032057cc7385.pdfIn PDF document text
    • http://xepuvibigin.22web.org/pewavara.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379229/normal_5fd165dc6691f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9dec8b8-c911-41bf-be0a-8f5178fd61e5/bufedunar.pdfIn PDF document text
    • http://zuraravata.epizy.com/residential_tenancy_agreement_template_bc.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/nukovarawitirepolobov.pdfIn PDF document text
    • http://sipomivizipe.epizy.com/kala_patthar_full_movie_hd_720p.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/baeb4222-7bb6-4432-a88a-3e362a85ff71/gopro_hero_3_specs_and_price_philippines.pdfIn PDF document text
    • http://femasusatatovet.epizy.com/68616812923.pdfIn PDF document text
    • http://dijixat.rf.gd/peronepa.pdfIn PDF document text
    • http://botawaxugeb.epizy.com/redimi2_el_nombre_de_jesus_letra_en_ingles.pdfIn PDF document text
    • http://retudazugo.rf.gd/bob_s_burgers_episode_guide_wiki.pdfIn PDF document text
    • http://livukizaxavubip.rf.gd/wireless_capsule_endoscopy_seminar_report.pdfIn PDF document text
    • http://pirefalanife.epizy.com/pemipawitopeke.pdfIn PDF document text
    • http://fudusimudupanu.rf.gd/92423019893.pdfIn PDF document text
    • http://joxisuzu.rf.gd/brahma_vaivarta_purana_in_bengali.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/61b03c68-22a2-42e7-b936-72860a827c11/what_are_the_five_conflict_resolution_modes.pdfIn PDF document text
    • https://s3.amazonaws.com/tevomenil/gukomezunalivu.pdfIn PDF document text
    • http://jixakobapufu.epizy.com/jirutiripawirafimujikira.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbfd610f-5631-422e-81ae-48d799ca66a8/scarlett_18i8_2nd_gen.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_off0000e847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE847 5116 bytes
SHA-256: 0729bef4596b89c6a3c5a12bff2ef1ea88a34759c579f14da47be26e3c9772bb
font_01_sfnt_off0000f987.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF987 10276 bytes
SHA-256: 8cd9266848206d857ae5cf6b23b962386369a2aff6561cbd1fe017c40bde4574

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