Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a20eb5abe6f3567…

MALICIOUS

PDF

64.8 KB Created: 2021-02-04 13:40:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 6217c8e521dbf1c3baebcc2d424f0aae SHA-1: bae8c927874faa7ee1b913a808472b68a1c31697 SHA-256: 6a20eb5abe6f35677ca6154c496681da0f92b34e46a74f1e2b7880f462057d58
166 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a phishing lure with invisible links to suspicious domains, such as http://managerprogram.live/descargar_snaptube_apk_para_pcq4lgm.pdf. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing attack, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://seumenha.ru/123?utm_term=cold+war+vocabulary+worksheet+answers+key PDF link annotation
    • http://mritzoliver.design/ordia_one_finger_platformersphp7u.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451350/normal_6015ef96cab89.pdfIn PDF document text
    • http://managerprogram.live/descargar_snaptube_apk_para_pcq4lgm.pdfIn PDF document text
    • http://onlyforyou.space/488261465387i94a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426545/normal_5fd8c95d69126.pdfIn PDF document text
    • http://oneshops.space/transformers_robots_in_disguise_characters_20018hemk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467979/normal_5fc9a0358337c.pdfIn PDF document text
    • http://idealica-ordina.site/bambukat_full_hd_movie_480prg4ct.pdfIn PDF document text
    • http://denizan.com/fake_credit_report_websitesrd5iq.pdfIn PDF document text
    • http://bofesota.66ghz.com/shin_chan_hd_pics.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403283/normal_5ff9c22643f94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450345/normal_60124683bdbda.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nuvebuxuloruvux.epizy.com/flight_pilot_simulator_3d_game.pdfIn PDF document text
    • http://fukefuxatolu.epizy.com/mezowebisemu.pdfIn PDF document text
    • http://lekekavom.epizy.com/42961822997.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/account_assistant_resume_format_doc.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/ergonomic_assessment_form_template.pdfIn PDF document text
    • http://lesiterifok.epizy.com/congenital_hypothyroidism_guidelines_espe.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_off0000be7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE7D 5388 bytes
SHA-256: 945fef4a350f69622b3912d582611ba6e572a1dcf1bd47cf5c9794fe98489cc5
font_01_sfnt_off0000d0df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0DF 10288 bytes
SHA-256: 2a671cbba359304822b2da8f9665efcf3af4ba2ae894920c4b2b317dabfbcf6a

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