Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfeb1810f0a62307…

MALICIOUS

PDF

82.3 KB Created: 2021-02-27 16:59:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 7b98718e493852d189fd4bdff5138650 SHA-1: b01d2c36156b7cca68e2c5978448a7f738364d58 SHA-256: dfeb1810f0a62307d15735e7628604cffd67f9230bed6cd6ac2d63dca2bf3841
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ML and ClamAV, as malicious. It contains numerous embedded URLs pointing to disposable domains and link farms, suggesting a phishing or malware distribution scheme. The presence of external URIs and the 'link farm' heuristic indicate an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jumiwimov.ru/wix?keyword=epic+summoners+level+7+hero PDF link annotation
    • http://unityfree.xyz/create_alert_box_in_androidpsda1.pdfIn PDF document text
    • http://wadixokup.22web.org/acute_coronary_syndrome_guidelines_aha.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383924/normal_602855e60e7b6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379610/normal_600b54cb33e62.pdfIn PDF document text
    • http://ses-sanobrabotka.ru/83007519830pt72b.pdfIn PDF document text
    • http://dimupure.22web.org/70139886869.pdfIn PDF document text
    • http://rowowevu.mypressonline.com/cambiar_tipo_de_archivo_de_audio.pdfIn PDF document text
    • https://satobolusiv.weebly.com/uploads/1/3/1/3/131398412/migemunita.pdfIn PDF document text
    • http://leopards.space/alternative_energy_definition8hpdr.pdfIn PDF document text
    • https://sevujixosatanin.weebly.com/uploads/1/3/5/3/135316334/luvabupopopidar.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485010/normal_6006222cdd4ff.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492275/normal_5fed13ba6c65f.pdfIn PDF document text
    • http://axecheat9.xyz/jalifimonnv9c.pdfIn PDF document text
    • https://viledilexemapol.weebly.com/uploads/1/3/4/6/134698440/banibigij.pdfIn PDF document text
    • https://dosedupuwosiwoz.weebly.com/uploads/1/3/0/7/130776272/6b9b4f0b01.pdfIn PDF document text
    • http://alfa-quest.ru/the_classic_slave_narratives_henry_louis_gates_jrrrybl.pdfIn PDF document text
    • http://lapitubemexidi.mywebcommunity.org/dekoso.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
    • http://retetopipazaned.epizy.com/badoo_live_app.pdfIn PDF document text
    • http://tunazafagid.epizy.com/biodata_format_simple.pdfIn PDF document text
    • http://kazaxese.epizy.com/63418429681.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_off0000f969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF969 4860 bytes
SHA-256: f3663fc2bd0e465189a23a951eb688cd8dd32bf86d3d74295ae2d507757bf7f9
font_01_sfnt_off000109c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109C3 10580 bytes
SHA-256: 83c0171426c015d6463621284ea9e455fc1214fd22d69357051c04bcd5b61382
font_02_sfnt_off00012dbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DBD 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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