Malicious PDF — malware analysis report

Static analysis result for SHA-256 68755c4b76adb2bb…

MALICIOUS

PDF

69.4 KB Created: 2021-03-20 15:33:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 716a6f59695f01f02f7647a366fbe0c9 SHA-1: 4eb4b629a92c1f8c17eb4e0ae3a59829513b116e SHA-256: 68755c4b76adb2bbf9c1e49833923b3b958666314df37fa3759eb7ba8a64ce42
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The embedded document body, though truncated, contains a plausible lure related to printer issues, which is likely intended to direct users to malicious URLs.

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.
  • 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=why+won%2527t+my+zebra+printer+print PDF link annotation
    • https://mefanajumajadip.weebly.com/uploads/1/3/1/6/131637152/fuzezefis.pdfIn PDF document text
    • http://diwejibazetar.iblogger.org/98035108120.pdfIn PDF document text
    • http://vapaxinodona.iblogger.org/harry_potter_wands_for_sale.pdfIn PDF document text
    • https://kosodakugup.weebly.com/uploads/1/3/4/6/134655388/zixeki-somizaxogovaxi.pdfIn PDF document text
    • http://takavejesutep.iblogger.org/vijaleradepolubekefose.pdfIn PDF document text
    • https://xobagesimijuvu.weebly.com/uploads/1/3/0/7/130776740/8337224.pdfIn PDF document text
    • http://xutiwavu.iblogger.org/bubisijibulakuw.pdfIn PDF document text
    • https://cdn.sqhk.co/gowamojon/RjficUf/magic_knight_rayearth_game.pdfIn PDF document text
    • http://tamizatej.22web.org/gubevevezevijiv.pdfIn PDF document text
    • https://wawanuxofidote.weebly.com/uploads/1/3/0/7/130775818/e6c7682814a9.pdfIn PDF document text
    • https://cdn.sqhk.co/riketumes/Wr2hjaX/tactical_assault_commander_4_ps4_pret.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9d50af6f-dbf7-41ba-b854-83985329a12b.filesusr.com/ugd/33c377_a0af8765beb64a289a8d9ba114167a91.pdf?index=trueIn PDF document text
    • http://vanomuwoz.epizy.com/sourceforge_s_safe.pdfIn PDF document text
    • http://mowigefugitixa.epizy.com/8762440603.pdfIn PDF document text
    • http://tixiwepire.epizy.com/fikulujuwosapufugibijo.pdfIn PDF document text
    • http://zepogofeto.epizy.com/types_of_chemical_reactions_lab_analysis_answers.pdfIn PDF document text
    • http://gekuvilis.epizy.com/car_accident_reporting_centre_toronto.pdfIn PDF document text
    • https://684917c6-b594-4497-9ea4-141105166a5b.filesusr.com/ugd/0dc9f5_0e7c10d91dd443a4a78956bfb57dea0a.pdf?index=trueIn PDF document text
    • https://35e1cc1d-5f6c-4a41-9b1b-b9ae8dddc97a.filesusr.com/ugd/351eee_0deb2de99cbb4c008c74499ee6a78a18.pdf?index=trueIn PDF document text
    • http://xokovuwewa.epizy.com/zemijatujonemoluxe.pdfIn PDF document text
    • http://kowuvemanavo.rf.gd/advanced_filter_excel_copy_to_new_sheet.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_off0000d28a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD28A 5280 bytes
SHA-256: b578d330b2f5f488d18e6df036b4ba13837f9d1000198c482d1129092d223b78
font_01_sfnt_off0000e47f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE47F 10320 bytes
SHA-256: 81b119e134a1a2f743637504d81099ea5171c164c4c5c02d5efbcaee94a9ade0

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