Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebe5129e257f21ba…

MALICIOUS

PDF

74.6 KB Created: 2021-03-06 06:59:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 0a79d2cb50013109ace8c707934f889c SHA-1: 4a867c85398540230d7a252fbb9086def56e464d SHA-256: ebe5129e257f21ba7caf865c67800e1786577390de4141f637921669773025d8
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to manipulate search engine results or distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of techniques used to redirect users to malicious sites, potentially for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://resalured.ru/strik?utm_term=how+to+get+directv+remote+to+work+with+tv PDF link annotation
    • http://xejepurefe.scienceontheweb.net/74862847101.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474470/normal_602af6b6d882d.pdfIn PDF document text
    • https://piwaxokireruber.weebly.com/uploads/1/3/0/9/130969414/967f8b.pdfIn PDF document text
    • https://xawuwotogot.weebly.com/uploads/1/3/2/6/132695388/fifujiwagilapo.pdfIn PDF document text
    • http://gopusoduj.mygamesonline.org/limikenuj.pdfIn PDF document text
    • http://dipenoguzel.sportsontheweb.net/yard_machine_lawn_mower_wont_start_after_winter.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469863/normal_5fcc03fc5f420.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372354/normal_600e98ea32a29.pdfIn PDF document text
    • http://pogawubujogeje.mypressonline.com/how_to_unclog_your_vacuum_hose.pdfIn PDF document text
    • http://tevaruv.sportsontheweb.net/star_wars_comic_book_chronology.pdfIn PDF document text
    • http://dabukim.mygamesonline.org/mr_heater_big_buddy_fan_hack.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bonatufumujipad.epizy.com/garena_speed_drifters_apk.pdfIn PDF document text
    • http://jokizexolej.epizy.com/55453277118.pdfIn PDF document text
    • https://2eeb51df-07ba-4372-80d9-1ef4646fc7f7.filesusr.com/ugd/6af210_7dd7c1b6cdb24e7986523107c523a16c.pdf?index=trueIn PDF document text
    • https://2c91b947-1dd8-401e-ae91-d595f2f75867.filesusr.com/ugd/0af078_68dd5c2051a84fb68176bae98b1c3271.pdf?index=trueIn PDF document text
    • http://nobegik.rf.gd/consumer_reports_canada_cars.pdfIn PDF document text
    • https://937a8a2d-b41a-4163-aff8-eda6db263557.filesusr.com/ugd/21e6f2_1018a8f3f12e46749c8aea415b23e686.pdf?index=trueIn PDF document text
    • http://pabotojixupi.atwebpages.com/burger_king_dec_2020_promotion.pdfIn PDF document text
    • https://ecfc1f44-6648-4072-bff5-6ee4adcfbe4f.filesusr.com/ugd/e5a943_639504d0bcb24b53b9daec4031f4fdcf.pdf?index=trueIn PDF document text
    • http://piwirapofo.epizy.com/15715081073.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_off0000e560.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE560 5108 bytes
SHA-256: 57bd30d3f8a1a385f20fce150f66da531748365003d586141b1cda987c1dd1a3
font_01_sfnt_off0000f6af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6AF 11516 bytes
SHA-256: ef7de81299ff2df74be516d8fbe5bb05e42765c51c1cb5e2599a5062b4224867