Malicious PDF — malware analysis report

Static analysis result for SHA-256 e54e021380eaca84…

MALICIOUS

PDF

70.8 KB Created: 2021-03-13 20:22:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: d3746a0c3c9288a3e81d67fa9a5df8db SHA-1: 9fb0e4433694b9affde4e7da8f964f570ac25c3c SHA-256: e54e021380eaca84f0264a8f26046fe93b204b96b9951cab79676e22732ae95b
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://mezovuduw.ru/wix?keyword=minecraft+curse+mods PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4414335/normal_5fd06fd48f4d8.pdfIn PDF document text
    • https://cdn.sqhk.co/figesuweno/wjgXoid/doxutedujisakidiwukerage.pdfIn PDF document text
    • https://bodonoweti.weebly.com/uploads/1/3/1/8/131856710/gotadinemusikip.pdfIn PDF document text
    • http://sumigemag.mywebcommunity.org/how_do_you_change_the_battery_in_a_casio_wave_ceptor.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477164/normal_5ff631e44a269.pdfIn PDF document text
    • http://likedizar.medianewsonline.com/filadomekumodelok.pdfIn PDF document text
    • https://gelupolo.weebly.com/uploads/1/3/5/3/135314506/juzejuf.pdfIn PDF document text
    • https://boxoxezerutevok.weebly.com/uploads/1/3/4/3/134317212/xujofawo_xejugu_nibuf.pdfIn PDF document text
    • https://cdn.sqhk.co/silijebutu/jfyYgh2/fafifulagar.pdfIn PDF document text
    • https://zanobevaduj.weebly.com/uploads/1/3/2/6/132682049/3414749.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491687/normal_6042fa2056edf.pdfIn PDF document text
    • https://buralekareze.weebly.com/uploads/1/3/4/3/134326789/subovopefaj-mubixifo-bibuzisorob.pdfIn PDF document text
    • https://cdn.sqhk.co/zinoliwomi/ihThchh/51800075341.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447880/normal_5ffb1e525f80c.pdfIn PDF document text
    • http://sabumow.mygamesonline.org/brother_pe_design_10_embroidery_full_software_free_download.pdfIn PDF document text
    • http://wubujonil.getenjoyment.net/bsc_agriculture_books_in_tamil.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c1908cc8-b41e-4b5b-ab1c-53d28a7f2745.filesusr.com/ugd/913720_a8e387102cfe4eb9910852875481a1ed.pdf?index=trueIn PDF document text
    • https://df6a9abb-74f3-47e1-b359-fe6d1019da36.filesusr.com/ugd/7921d2_5da77857f47b4ecc9132705585040605.pdf?index=trueIn PDF document text
    • https://1afae0f6-9e35-4dc9-9db7-5dbf78511926.filesusr.com/ugd/afe78f_cc23ccbb346d4a4396fa98faed9a3ca6.pdf?index=trueIn PDF document text
    • https://af18ad75-7652-4b25-b9e0-8da5fded0af1.filesusr.com/ugd/529385_0e69c925d1054fd8b08507f5e38b834e.pdf?index=trueIn PDF document text
    • https://d4508431-0eee-4913-ac2a-2ec907ed9b18.filesusr.com/ugd/12daa7_e17d935559a7499087ef8ff8631f9918.pdf?index=trueIn PDF document text
    • https://5071cc05-3fa2-46b1-b944-d2523ca4b51d.filesusr.com/ugd/62e2c1_a277799e0ccd4ac0b7891dcedd0d9094.pdf?index=trueIn PDF document text
    • http://nuluwajewugutik.onlinewebshop.net/nojutaxojavulemi.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_off0000d5f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5F8 5140 bytes
SHA-256: cf9f0e2e6ce6da29cb5228a0c1674f60c329c92dfa089137a2cb66ba08f9dad1
font_01_sfnt_off0000e765.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE765 11324 bytes
SHA-256: b112148087f4fb9a5d07b7179b2ec39bf5ff3d794632fa585b50325f04aed934