Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b8a76747886be66…

MALICIOUS

PDF

76.5 KB Created: 2021-03-31 05:15:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8072b90875d06a1c323cb562ceac6be9 SHA-1: 3e146d5bcc78cfcad02fd7861ae18e4955c4ea54 SHA-256: 1b8a76747886be662aec127bd6f8069b17e29d1ce5d4e145f00d9b7475ba0bbd
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, flagged as a link farm, with the primary URL suggesting a lure related to 'protected areas in ethiopia pdf'. ClamAV detected this as Pdf.Phishing.Trojan, and an ML classifier also flagged it as malicious. The presence of embedded URLs and the nature of the link farm indicate an attempt to redirect users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jumiwimov.ru/award?keyword=protected+areas+in+ethiopia+pdf
    • https://cdn.sqhk.co/gabazumad/Acjaii6/bikamorenulupeninaxu.pdf
    • http://wezutoxizuwal.22web.org/b._ed_2019_form_correction_date.pdf
    • https://cdn.sqhk.co/niserutom/hijiigh/97200095883.pdf
    • https://cdn.sqhk.co/fenajobuwer/dSvjh25/numbers_1-_100_in_french.pdf
    • https://cdn.sqhk.co/mimofeto/mjepagf/death_city_zombie_invasion_mod_apk_download.pdf
    • https://cdn.sqhk.co/vavetiset/ejdYges/firefox_52._3._0.pdf
    • http://kifawajunob.iblogger.org/decreto_de_guerra_a_muerte_resumen_corto.pdf
    • https://cdn.sqhk.co/bisuligiga/hhjfXiB/digital_marketing_strategy_apple.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/saziwijaxodav/vosozerok.pdf
    • https://d3826037-6016-486c-99e9-dc41bc666644.filesusr.com/ugd/b81754_af95092a0a6d4a74bb308561c60a805c.pdf?index=true
    • http://sabenimuzu.rf.gd/ieee_word_document_template.pdf
    • https://s3.amazonaws.com/mojivikapeti/wukelomijuxiwuwibikum.pdf
    • http://javozajesaretu.epizy.com/bajrangi_odia_song_ringtone.pdf
    • https://uploads.strikinglycdn.com/files/2adbccc4-412c-490a-a254-28dfdfe607ca/casos_de_uso_ejemplos_software.pdf
    • https://uploads.strikinglycdn.com/files/56b608e0-0bf0-48a3-8aeb-232a38914ecf/gmat_official_guide_quantitative_review_2021.pdf
    • https://409b2d23-5c1d-402e-97df-26c0da9299b0.filesusr.com/ugd/2e3d42_1ce245a2f3c147a6a347929a6552f632.pdf?index=true
    • https://6131fb9f-3080-406c-a6ab-c4686b6a2f6f.filesusr.com/ugd/52be6f_9497cb1a75d7431b9af11149f09a1865.pdf?index=true
    • http://furovival.rf.gd/australian_influenza_surveillance_report_2019.pdf
    • https://b3159766-6c8b-4733-a97d-e59ef6783693.filesusr.com/ugd/21851e_3981a666480e49909366b18d654ea6c2.pdf?index=true
    • https://s3.amazonaws.com/bejenosugede/tujufofijojogogisasal.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_off0000ece6.bin
6b938e0481cf798246d0a6b49ca75c194c040b9869eb35f9ea0b37f751d1434a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xECE6 5212 bytes
font_01_sfnt_off0000fe9a.bin
01c8abef5f25a880633d4512275b74bc99924b38b2cd8e203ff05c940678bb57		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE9A 11124 bytes

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