Malicious PDF — malware analysis report

Static analysis result for SHA-256 53e2c471a63e7ffb…

MALICIOUS

PDF

77.9 KB Created: 2021-02-28 00:42:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 5c4b281c77731f80fb863923d7534352 SHA-1: 4fb7d4e01c476f2fe3930ddb7e3dd4aa3334d7eb SHA-256: 53e2c471a63e7ffb2958cf77479b1be94eaf197f54bfc609494149e4fcc26199
236 Risk Score

Malware Insights

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

This PDF document exhibits multiple indicators of malicious intent, including a high ML classification score and ClamAV detection as a phishing trojan. The document's content and heuristics suggest it's designed to trick users into executing further malicious code, possibly by instructing them to copy and paste commands into a shell or by providing a password for an encrypted archive. The presence of numerous external links, including one pointing to `https://baarspo.ru/strik?utm_term=epmp+1000+reset+password`, indicates a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=epmp+1000+reset+password PDF link annotation
    • http://lnstagramverifiedsbadgesforms.com/chloroform_use_in_oral_medicinesjemb0.pdfIn PDF document text
    • http://helpcopyright-service.com/what_does_kag_meanwj87k.pdfIn PDF document text
    • http://gratoraama.website/rugby_league_2019_mod_apk2g24t.pdfIn PDF document text
    • http://gaydating.world/the_day_the_crayons_quit_read_aloud_onlinet7l27.pdfIn PDF document text
    • http://gulebamabixaku.22web.org/video_converter_android_2_pro_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463010/normal_5fdfd873e1052.pdfIn PDF document text
    • http://nogafadak.iblogger.org/what_is_the_best_software_to_use_with_cricut.pdfIn PDF document text
    • http://3gusevshop.website/zokakg9dtu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486563/normal_5fe80e5abbf72.pdfIn PDF document text
    • https://xokijawajix.weebly.com/uploads/1/3/4/7/134726357/pukivubukimibedab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465018/normal_6038e2c7d07fa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492286/normal_5fdc2fd7f39d2.pdfIn PDF document text
    • http://vermono.site/bbc_mundo_venezuela_crisisiyegl.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/rurovikejigibu/kurokolopem.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/tuzivabedibide.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/3_digit_addition_worksheets_for_3rd_grade.pdfIn PDF document text
    • http://sabozet.epizy.com/mozetabefovi.pdfIn PDF document text
    • https://s3.amazonaws.com/wusigipufuvowix/monajadajanevisid.pdfIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/womonepedezapekizonesav.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_off0000f2ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CA 5316 bytes
SHA-256: ca7ada02695a57b15dc0604bfa2e526cda99846f0ad31d52800c2b636c9633ff
font_01_sfnt_off000104de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104DE 11032 bytes
SHA-256: fbb83ec26d6b5a5697dd020d1e47e01bbaa4e935f53165c892350da8ff892309

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