Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4e6cefc8faf5295…

MALICIOUS

PDF

80.3 KB Created: 2021-03-09 06:54:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 87349a7ec30aca11e07946afb5227e36 SHA-1: 70342493c89aa5b919952d5730055540662b65a5 SHA-256: c4e6cefc8faf529540c3bb4aa3eb4c3c117fcf19819004e82c233b6f5df20c69
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, appears to be a lure related to sewing machines, directing users to a URL that is likely malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9954

Heuristics 5

  • 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 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://baarspo.ru/strik?utm_term=how+to+thread+a+consew+sewing+machine PDF link annotation
    • http://safijejog.mygamesonline.org/68190021722.pdfIn PDF document text
    • http://mirumumavetifun.mypressonline.com/16262795909.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369656/normal_5fd3b94f3c3d8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407793/normal_5fe03aa5d0b3b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4506170/normal_5fcd716ebf067.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403823/normal_5fe710afcd3e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403681/normal_60228b6eacef4.pdfIn PDF document text
    • http://rijebipimaba.getenjoyment.net/44425397644.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://furunes.onlinewebshop.net/the_hiding_place_movie_corrie_ten_boom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fdad886-e553-4bc3-ab3c-3710b2ac1262/ovid_metamorphoses_book_iii.pdfIn PDF document text
    • https://2ea9429b-0332-4ee6-bb75-ab9535b56c99.filesusr.com/ugd/e2f7e1_4104fc4fac3d4bb0ba40cafe907de1ca.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0444f103-5474-4a70-9e1f-bc923f1af68c/segejorasuvuj.pdfIn PDF document text
    • http://fovawipemezipu.myartsonline.com/nowizojamaju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a00f199b-90bf-4c37-b915-a631074e67be/30322933258.pdfIn PDF document text
    • http://zejowupifodoj.rf.gd/kefof.pdfIn PDF document text
    • https://5de9ed01-d610-4143-94db-6f998645a8ce.filesusr.com/ugd/1d8bf6_8af01130054846399b438af8d6fc5ff6.pdf?index=trueIn PDF document text
    • http://vanepozimor.rf.gd/98792377288.pdfIn PDF document text
    • https://3633ae4e-9acc-45df-885e-1bfa1481cb44.filesusr.com/ugd/e73054_7589d0271fb643ceb9b0fb790e595c37.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/12eb6696-ac5e-4103-9139-7243a448e3be/66891979129.pdfIn PDF document text
    • http://gosaduzunake.myartsonline.com/85313488735.pdfIn PDF document text
    • http://vujuvisesakok.myartsonline.com/bonezat.pdfIn PDF document text
    • http://pujumek.myartsonline.com/tores.pdfIn PDF document text
    • http://fidalanono.myartsonline.com/tosal.pdfIn PDF document text
    • http://fezipowivi.rf.gd/financial_accounting_and_reporting_syllabus_philippines_2018.pdfIn PDF document text
    • https://bed1e925-73f7-457c-87ff-53f226988024.filesusr.com/ugd/d4a8ce_137226ea00744559bf05fc6cc66db15f.pdf?index=trueIn PDF document text
    • http://duzewinabo.epizy.com/film_fifty_shades_of_grey_full_movie_subtitle_indonesia_indoxxi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eeea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEEA 5160 bytes
SHA-256: 064838b433e71ff6f6696c51fce2dd3b7d3771977e6b41b820c8d961617f4a38
font_01_sfnt_off0001004f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1004F 11132 bytes
SHA-256: 56e2e9f6be2112f5a3bb3b933b7db7a502df963b8cac7fdf4c6824255c1bacb1
font_02_sfnt_off0001256d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1256D 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3