Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e13a6eed8a2fa27…

MALICIOUS

PDF

174.6 KB Created: 2021-02-22 12:05:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 664ae67abc8866dbed193c53eba41b8e SHA-1: e8903ae82d44b7d179e6e354f0f8380f42025f0a SHA-256: 5e13a6eed8a2fa276600a4a439bc395adff1fbcc57140161beb0664eddef46c7
224 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

This PDF file exhibits malicious characteristics, including links to known malicious redirectors and a lure for remote support tools. The ML classifier and ClamAV detection strongly indicate malicious intent. The document's purpose appears to be tricking users into installing or connecting to a remote support tool, likely to gain unauthorized access or deliver further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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.
  • 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://yafferge.ru/123?utm_term=fallout+4+map+command In PDF document text
    • https://cdn.sqhk.co/kudozaporuro/hgcgcqv/tefusememamimo.pdfIn PDF document text
    • https://gilijopagexoda.weebly.com/uploads/1/3/4/7/134713479/cf70b9a7d.pdfIn PDF document text
    • https://cdn.sqhk.co/pesenexur/byjggri/teamviewer_quicksupport_ios_remote_control.pdfIn PDF document text
    • https://cdn.sqhk.co/zoxogatuv/Tjb7CQu/29360230768.pdfIn PDF document text
    • https://cdn.sqhk.co/naxudufejik/vjaggcy/fofafezowigodenil.pdfIn PDF document text
    • https://cdn.sqhk.co/dukizukijire/hehb0ij/49754111178.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450504/normal_5fc7663bd37f9.pdfIn PDF document text
    • https://cdn.sqhk.co/sovanoniwuva/heggh76/wifugisomusitofufozuroruf.pdfIn PDF document text
    • https://roguraluvi.weebly.com/uploads/1/3/0/7/130776180/dejuroj.pdfIn PDF document text
    • https://cdn.sqhk.co/rijomawonuj/hihggi9/kohl_s_senior_discount_online.pdfIn PDF document text
    • https://petirinupupa.weebly.com/uploads/1/3/1/4/131438611/xowen-xekerewulopabuk.pdfIn PDF document text
    • https://zanemuwezujapab.weebly.com/uploads/1/3/4/7/134765617/fezizovolulapejum.pdfIn PDF document text
    • https://cdn.sqhk.co/wolitobutak/VexYY7K/real_time_shields_tips.pdfIn PDF document text
    • https://nokavapeselodes.weebly.com/uploads/1/3/4/6/134638024/506607.pdfIn PDF document text
    • https://bazifimu.weebly.com/uploads/1/3/4/6/134661545/bopojase.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/tirimofufemukat/87122541294.pdfIn PDF document text
    • https://s3.amazonaws.com/pafexegud/79781711110.pdfIn PDF document text
    • https://s3.amazonaws.com/jefobexapulow/clat_pg_2019_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/endometriosis_guidelines_2018.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_off00026f87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26F87 4988 bytes
SHA-256: 52e51a6ba56ace27fbbb17bebee43b36c5308a1fd02eff673a750a162a6ca3b4
font_01_sfnt_off00028076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28076 14068 bytes
SHA-256: a08d57abbe7f0e7ef94d49f802ebf60d5dac2167936b1a643e9a7c30fc2d35fe

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