Malicious PDF — malware analysis report

Static analysis result for SHA-256 b63e61b9bc25e3eb…

MALICIOUS

PDF

80.0 KB Created: 2021-02-25 01:29:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: b203dea54bc819fa5c4adb880dcc296e SHA-1: fb0d7caccdeb154b369f7308a701a5668c1eef67 SHA-256: b63e61b9bc25e3eb44ee35cbf25594a1dc6d1020add5ae8473f28c55760e1f4f
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a remote-support lure. 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 0.9996

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.
  • 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
  • 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://jacksth.ru/wix?keyword=will+circle+k+hire+felons PDF link annotation
    • https://cdn.sqhk.co/feripamapuv/U4jbZFs/nogorebodurufen.pdfIn PDF document text
    • https://cdn.sqhk.co/wolebiduju/xighhxU/splashtop_2_remote_desktop_apk.pdfIn PDF document text
    • http://excschool.ru/arijit_singh_all_songs_download_mp3ld8mh.pdfIn PDF document text
    • https://fegejakir.weebly.com/uploads/1/3/5/2/135299458/fesuxagom.pdfIn PDF document text
    • https://cdn.sqhk.co/mifigatira/hcQhfqW/sacrifice_definition_oxford_dictionary.pdfIn PDF document text
    • http://pubgmobiie.com/2001_subaru_outback_h6_for_salermr21.pdfIn PDF document text
    • https://novigavaze.weebly.com/uploads/1/3/0/8/130874354/6598060.pdfIn PDF document text
    • https://cdn.sqhk.co/patemugimej/dIQhaia/dojavotapaz.pdfIn PDF document text
    • https://cdn.sqhk.co/fedelubu/jdji8hj/25960064081.pdfIn PDF document text
    • https://cdn.sqhk.co/zeburozupax/hjjfeTf/vugetatipoxuborevunirisi.pdfIn PDF document text
    • http://excschool.ru/zaniwejonoteribusmoieu.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
    • https://s3.amazonaws.com/zoluwivebiro/96084382319.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/2016_acura_mdx_owners_manual_canada.pdfIn PDF document text
    • https://s3.amazonaws.com/popilo/15659078642.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/xeniwixe.pdfIn PDF document text
    • https://s3.amazonaws.com/jemisajoda/16446522187.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA18 4544 bytes
SHA-256: fed176d40864a54fad1a8299ec69c60d621fef7bcc1bbda9bfdf6dd4dc82fca6
font_01_sfnt_off0000f966.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF966 1796 bytes
SHA-256: dfab3945eace5ba27be1ad95d63d5142397767eab6bca27773794b33bda2302c
font_02_sfnt_off000101f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F0 10184 bytes
SHA-256: b2e2e653f5dae6330a2def33508bb13ff4174a39fcc8fdb6f2237da3a8172a1a
font_03_sfnt_off000124cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124CB 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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