Malicious PDF — malware analysis report

Static analysis result for SHA-256 0059ad6774b4fc9b…

MALICIOUS

PDF

76.0 KB Created: 2021-06-11 09:19:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: b812e8de9e1b5064fdf30fb73ce48f06 SHA-1: e1e617f0f30f470080e5e27e40c8a24f182face8 SHA-256: 0059ad6774b4fc9b332ae0d2bb082b631b0dde4b960566fed32b4b2bced6eb17
186 Risk Score

Malware Insights

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

The PDF contains numerous external links, many hosted on disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, contains text related to 'social profile view notification', aligning with the heuristic findings of a lure to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://smidgel.ru/pbw?utm_term=social+profile+view+notification+for+chrome PDF link annotation
    • https://fedalovojuxunod.weebly.com/uploads/1/3/0/7/130775560/2672fb60e.pdfIn PDF document text
    • https://jexiliwole.weebly.com/uploads/1/3/0/7/130739190/gutegeboga.pdfIn PDF document text
    • https://rikovikoxeko.weebly.com/uploads/1/3/2/7/132740842/bokudemojilali.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489255/normal_606e471961b56.pdfIn PDF document text
    • https://sasozubavurak.weebly.com/uploads/1/3/4/8/134886198/nudibumikule_xeduzifuresuv_nujizerova.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421199/normal_60671ec439bda.pdfIn PDF document text
    • https://kapekutom.weebly.com/uploads/1/3/4/4/134437999/5051663.pdfIn PDF document text
    • https://warororob.weebly.com/uploads/1/3/5/3/135314520/resubuluzapoxu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443602/normal_5fe4012c20866.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414357/normal_6067237fd8276.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489716/normal_5fc8133bd51af.pdfIn PDF document text
    • https://dagojamigim.weebly.com/uploads/1/3/4/7/134763314/bonopa.pdfIn PDF document text
    • https://dokipodaj.weebly.com/uploads/1/3/4/3/134306773/4316473.pdfIn PDF document text
    • https://xusuberole.weebly.com/uploads/1/3/4/7/134744642/fotusivip-sanisunirow.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a24e196-c3c9-484c-8709-6b9662c9a1c4/pfaff_sewing_repair_near_me.pdfIn PDF document text
    • http://kekirow.pbworks.com/w/file/fetch/144810876/42861256294.pdfIn PDF document text
    • http://lojefizowoj.pbworks.com/f/33571465456.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6d37aa6-577a-4361-919e-ad0c50e79eba/38729274175.pdfIn PDF document text
    • http://gopidam.pbworks.com/f/poemas_para_despedida_de_la_escuela_primaria.pdfIn PDF document text
    • http://jitijaloj.pbworks.com/w/file/fetch/144511536/radhe_krishna_ki_jyoti_alokik_mp3_download_pagalworld.pdfIn PDF document text
    • http://panuduxeruv.pbworks.com/f/jitubusodixamizerisu.pdfIn PDF document text
    • http://devopiporo.pbworks.com/w/file/fetch/144738234/rise_of_empires_ice_and_fire_best_orange_heroes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9ac1365-727d-473f-8cf9-0962e8b1bdb4/the_tragedy_of_great_power_politics_chapter_2_summary.pdfIn PDF document text
    • http://jesababa.pbworks.com/f/84177018953.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_off0000eaa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA1 5332 bytes
SHA-256: 378ae052e5c2d4d29f4ddb692950aa3784b012ebfa493ffbcc235cb0efbe59b0
font_01_sfnt_off0000fcb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB5 11072 bytes
SHA-256: 09eb2d037034cae309a269ce3c5162861d9c4689ecb9d531b08c5e335f002bfe