Malicious PDF — malware analysis report

Static analysis result for SHA-256 e221fd5436ace83c…

MALICIOUS

PDF

84.5 KB Created: 2021-02-28 10:59:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 4d155efcf80ea0176df2b9d5b94feedc SHA-1: bb4e90c4c71fb2f63f154900d378a5dd07c8c2f9 SHA-256: e221fd5436ace83cebd068b9ca44fb2afcd17d01d6fdd94e0b0700fedc7cffae
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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://seumenha.ru/strik?utm_term=my+whirlpool+washer+won%2527t+power+on PDF link annotation
    • https://cdn.sqhk.co/figakeves/gjPgeww/21318836218.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455381/normal_5fc8be3d041f1.pdfIn PDF document text
    • http://winoxolupuvil.getenjoyment.net/putipafiwuv.pdfIn PDF document text
    • https://cdn.sqhk.co/zipirevofu/ehjjhYX/tropico_6_el_prez_edition_ps4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376101/normal_5fda56582fc2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469104/normal_601f683abf1e0.pdfIn PDF document text
    • https://cdn.sqhk.co/pinofizulag/pjfgfsK/65799809354.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419828/normal_5fd7bba599967.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475727/normal_5fcb9b809acee.pdfIn PDF document text
    • https://cdn.sqhk.co/lukumuzu/ehbgfha/88525980852.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464303/normal_5fdb3cb20f8f8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388825/normal_5fe40ca8c1101.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vunefukovamin.rf.gd/car_accident_news_report_example.pdfIn PDF document text
    • http://babefuv.epizy.com/pp_corrugated_sheet_singapore.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/bendito_el_dios_y_padre_lldm.pdfIn PDF document text
    • https://s3.amazonaws.com/xeruxaxer/msa_altair_4xr.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/21367304058.pdfIn PDF document text
    • http://pigafutuvip.rf.gd/english_guide_for_class_11_ncert.pdfIn PDF document text
    • https://s3.amazonaws.com/miledu/vpn_proxy_master_unlimited_vpn_apk.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_off00010e09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E09 5140 bytes
SHA-256: caf9e841792f1a88966ac41a6ceddb85f9c89951dc439feeb2da4c6ee6022839
font_01_sfnt_off00011fa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FA0 10944 bytes
SHA-256: e4f10b9f3b25484a59f9b95c0f2fab8ebdeac26369c3a478090a192da799ab03

Open this report in the interactive analyzer, or submit your own file for analysis.