Malicious PDF — malware analysis report

Static analysis result for SHA-256 00c3818303dde6b4…

MALICIOUS

PDF

91.5 KB Created: 2021-03-17 01:52:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 207f6f952189345275348d66f17478ed SHA-1: 26d14244e439ef9d7663d81d2142d6cf4e75ea88 SHA-256: 00c3818303dde6b4e5186c363f14027c97b8618dd562ec140508384d00e57ee0
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains a large number of external links, including a suspicious URL hosted on 'lozipotod.ru', suggesting a phishing or content-luring attempt. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate the document's primary function is to direct users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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 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.
  • 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://lozipotod.ru/wix?keyword=escalation+protocol+weapons+how+to+get PDF link annotation
    • 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
    • http://zuvojiveko.rf.gd/cerberus_ftp_server_serial.pdfIn PDF document text
    • http://kifasonow.rf.gd/hypoallergenic_foods.pdfIn PDF document text
    • https://d6bf9bfb-c092-4b17-ab9f-91da83e6a9d2.filesusr.com/ugd/d7ad14_6644ecbcac93421eb2c6a8b5b5cb053c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pigolo/detroit_diesel_series_60_repair_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/nitajosasa/analytics_platform_architecture.pdfIn PDF document text
    • https://s3.amazonaws.com/zoxewudunigus/98429785253.pdfIn PDF document text
    • https://s3.amazonaws.com/zepifudoxapo/dusoxelofutejizoxijixepas.pdfIn PDF document text
    • https://s3.amazonaws.com/xajowu/11484464339.pdfIn PDF document text
    • https://s3.amazonaws.com/suzujewa/fulirigoj.pdfIn PDF document text
    • http://sonazawokog.rf.gd/94577622053.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxalirudidel/angularjs_template_inject_html.pdfIn PDF document text
    • http://jodonurinifos.epizy.com/funny_magic_8_ball_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/how_to_pay_interim_dividend.pdfIn PDF document text
    • https://f3874c2d-c116-49c2-b7b6-9300dc8fc43e.filesusr.com/ugd/b11f6d_2244963e04e6457db5e48612727a6413.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mexesazaxasa/sevewepuzudutize.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/dovosiwupewos.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/bedalibarodigak.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/cirrosis_hepatica_alcoholica.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/what_is_lscs_what_are_its_indications.pdfIn PDF document text
    • https://s3.amazonaws.com/naxozelozude/stumbling_on_happiness_ted_talk.pdfIn PDF document text
    • https://f4ef19d8-372f-49db-bbb6-0f5e16bfa625.filesusr.com/ugd/070799_e9002d571cf74730a3f33bbd1fc741a6.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zijivevip/57983222398.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/crafting_leveling_guide_osrs.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/super_fancy_pants_adventure_apk_mod.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/multiple_choice_quiz_maker.pdfIn PDF document text
    • https://07f52280-50dc-49c2-beec-a2e30bf849d0.filesusr.com/ugd/7b8f90_f44695d577534fea807cfe34a26064eb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xofalepelala/quickbooks_journal_entry_import_template.pdfIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/dadilutonikovowurazafuf.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_off00010271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10271 5684 bytes
SHA-256: a1d4b4ef63028827178241b03ad21f71b37cc5aca084a3cd06c9f9e03f503cc0
font_01_sfnt_off00011645.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11645 5032 bytes
SHA-256: 0700f192246d7f3673ea95fe77fd98c8a245a66d78d9d3dddf11da10b51bd187
font_02_sfnt_off00012762.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12762 12188 bytes
SHA-256: ab9bb4e230d7258d6f41503add3e8269f6248a55b13e080a0fe240f90e1d27a3
font_03_sfnt_off00014f71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F71 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176