Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0fbec585db71c90…

MALICIOUS

PDF

91.5 KB Created: 2021-03-28 12:03:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f629c0bad6f82215c7b3bff587e9020c SHA-1: 339b0ff968907154450d730b1822ab5aa9690247 SHA-256: e0fbec585db71c90ec345fdaa281740db1185d2797a364b57435cd4eda9e2a07
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to suspicious domains and are likely part of a link farm designed to improve search engine rankings for malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://gimoguvi.ru/award?keyword=web+design+proposal+letter+pdf
    • https://kizevopizimi.weebly.com/uploads/1/3/5/3/135351298/maxelilosagi_xuwiwuj.pdf
    • http://olivamebel.com/57579410477sxqi1.pdf
    • http://forpost-electrica.ru/fujitsu_halcyon_inverter_blinking_lightsuo5hj.pdf
    • http://passive-income.ru/23849236319i8abw.pdf
    • https://volokosebu.weebly.com/uploads/1/3/4/8/134871595/4b70e7d2833b8ea.pdf
    • https://reguxisafado.weebly.com/uploads/1/3/4/2/134265580/b45f2.pdf
    • http://dirtygirl.fun/el_moasser_math_1st_secondary_guide_answers3miuo.pdf
    • http://letnesil.xyz/moxofevakexotozetwyn7.pdf
    • https://vawalebadafi.weebly.com/uploads/1/3/4/6/134660315/xufiputezeleg.pdf
    • https://dekamukovesu.weebly.com/uploads/1/3/5/3/135324216/tomel.pdf
    • https://fanepolareroroz.weebly.com/uploads/1/3/4/6/134666972/bikava.pdf
    • https://jofenunamupil.weebly.com/uploads/1/3/4/3/134343358/natak.pdf
    • https://susejovidexoxi.weebly.com/uploads/1/3/0/7/130775922/1061987.pdf
    • https://gudogetoji.weebly.com/uploads/1/3/4/6/134634169/depuvimosig.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c6357313-3c11-4eff-bc04-11f6c91a545a/zalaredovem.pdf
    • https://s3.amazonaws.com/padadutiseni/zozojibukikotagusix.pdf
    • https://s3.amazonaws.com/kulinisokakewi/arch_linux_python_development_environment.pdf
    • https://uploads.strikinglycdn.com/files/7e338289-4d28-4b62-951c-90bbb75e374d/osha_construction_10_hour_safety_training_card.pdf
    • https://s3.amazonaws.com/bokofapig/traductor_de_ingles_a_espaol_audio_google.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000124e3.bin
7bfe6bf2f80f5fc655dcda80fead02e0451728cfca61a847b1f0a377fc963f59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x124E3 5360 bytes
font_01_sfnt_off00013738.bin
7d91c184d625ac7b11f9b03937687cfa8643711db931d6f034604f520311cc42		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13738 11720 bytes

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