Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ea806e8f1632704…

MALICIOUS

PDF

78.7 KB Created: 2021-03-12 01:47:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: eedb4134935e34dae362c2f240bcadca SHA-1: 3f29db8207ad406dab3240eff62a84281221cced SHA-256: 2ea806e8f16327045128e3ff4fa42096b8f9f9eb5cab9e09409dc39844f9855e
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as a link farm, containing numerous external links to various domains. The ML classifier and ClamAV also identified it as malicious, specifically as a phishing trojan. The embedded URLs, such as jumiwimov.ru, likely serve as lures for phishing attempts or to distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://jumiwimov.ru/aws?utm_term=como+ganar+amigos+e+influir+en+las+personas+audiolibro+mp3 PDF link annotation
    • https://tumunonapuve.weebly.com/uploads/1/3/1/3/131379134/notosisekunas.pdfIn PDF document text
    • http://dwatches.site/twilight_river_flows_in_you_piano_notesntvig.pdfIn PDF document text
    • https://cdn.sqhk.co/supetuzitepi/SLsN3mT/jepilulepejixipawexok.pdfIn PDF document text
    • https://filafibiwi.weebly.com/uploads/1/3/4/3/134316544/5319132.pdfIn PDF document text
    • https://cdn.sqhk.co/gonolesuzam/jjmhjig/bafot.pdfIn PDF document text
    • https://luxoxika.weebly.com/uploads/1/3/4/8/134899107/dugixalelave.pdfIn PDF document text
    • http://wazepewazivulil.mywebcommunity.org/cincinnati_bengals_schedule.pdfIn PDF document text
    • http://rivozuzeno.mywebcommunity.org/manual_de_organizacion_y_procedimientos_hospitalarios.pdfIn PDF document text
    • https://cdn.sqhk.co/karadirimose/jyIhjib/nisabafi.pdfIn PDF document text
    • https://cdn.sqhk.co/kobedobofepo/hcibggL/28811417734.pdfIn PDF document text
    • https://bipusisep.weebly.com/uploads/1/3/0/7/130775903/diribunarudazebex.pdfIn PDF document text
    • http://tejasatobes.medianewsonline.com/anticonceptivos_orales_2020.pdfIn PDF document text
    • http://copyrighthelpcentral.com/lagekelikabenemokq5.pdfIn PDF document text
    • https://cdn.sqhk.co/zanivuwiduvo/al1RSth/28095685328.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://uploads.strikinglycdn.com/files/1d04e3fb-87f3-459c-a3e8-00de351efc9a/52417374466.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77137258-b918-4ddf-a0d1-0a4d6a69ea14/ropijaxetubofabepuxezivun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e0a9f15-d78a-46b9-8a15-2f66b0c4fdbf/what_is_the_best_bread_machine_for_home_use.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a1eebe2-3d4e-4f13-9cb5-3be028da48d4/how_to_sketch_for_beginners_using_pencil.pdfIn PDF document text
    • https://0e67983c-e844-40c9-b604-97311ec94efe.filesusr.com/ugd/6e13d9_5b371aa17ccb4806a7362c48ae1ac5bd.pdf?index=trueIn PDF document text
    • https://ae26bae5-b1f3-4fb2-a0ba-5d2f2d23988c.filesusr.com/ugd/aec2ea_78df489925a14449a0fe0bef0d56e765.pdf?index=trueIn PDF document text
    • https://297de083-771a-4730-a3b8-a2afe8c7d209.filesusr.com/ugd/47424f_8c7590dc8ee14acf8c9297aad9976ff0.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e18c9bf0-cfd3-4e2f-9764-c47a00b27a48/reversible_plush_pattern.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_off0000e409.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE409 5488 bytes
SHA-256: 65c883e070d20245816acd55734843c795207e58e4ea358b811db196a5b9ba6e
font_01_sfnt_off0000f693.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF693 11708 bytes
SHA-256: 598bb3e89ca0190a32e10bf1614b72c6fe94f67eba4a248ec56ae083aaf2c11a
font_02_sfnt_off00011c73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C73 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361