Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3247bcaea7671f8…

MALICIOUS

PDF

92.1 KB Created: 2021-03-06 01:25:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8f49d102d0c2b0de332fd7bdd0054c9e SHA-1: 9a7992832a80029f5317044de4c7d942d11bc346 SHA-256: e3247bcaea7671f86d3c3f2c2fedb7c9fc914da871045017467ac614cc1a7fb6
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 0.9997

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://mezovuduw.ru/strik?utm_term=philips+norelco+multigroom+5000+vs+7000 PDF link annotation
    • https://salofapaj.weebly.com/uploads/1/3/4/3/134314320/1666937.pdfIn PDF document text
    • https://kimogixolemalo.weebly.com/uploads/1/3/5/9/135964987/6505386.pdfIn PDF document text
    • https://jinimajaloxole.weebly.com/uploads/1/3/5/3/135314869/jikejowixatula.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368240/normal_5fc988fde0a1d.pdfIn PDF document text
    • https://vamabeloketofip.weebly.com/uploads/1/3/4/3/134344852/7c41ab.pdfIn PDF document text
    • https://selamosufuk.weebly.com/uploads/1/3/4/4/134463567/5470218.pdfIn PDF document text
    • http://wixotuvotinunu.iblogger.org/game_dev_story_apk_aptoide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378606/normal_5fe9da2ea02b1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nowaginog.epizy.com/91857028023.pdfIn PDF document text
    • https://s3.amazonaws.com/takateg/6992996380.pdfIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/afterlife_with_archie_11.pdfIn PDF document text
    • https://s3.amazonaws.com/zetituri/briggs_and_stratton_550ex_spark_plug_champion.pdfIn PDF document text
    • https://s3.amazonaws.com/potamotaz/cursive_writing_worksheets_australia.pdfIn PDF document text
    • http://danofida.epizy.com/do_navy_officers_get_bonuses.pdfIn PDF document text
    • http://jexiduro.rf.gd/lapeer_michigan_weather_report.pdfIn PDF document text
    • http://zilajib.epizy.com/annual_report_of_coca_cola_company_2018.pdfIn PDF document text
    • http://zilajib.epizy.com/devils_lake_fishing_report_nd.pdfIn PDF document text
    • http://todizugofufufax.epizy.com/60029957121.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/socialism_capitalism_and_democracy.pdfIn PDF document text
    • http://zeluwaboder.rf.gd/jibuwebipedorapozobep.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001165f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1165F 5544 bytes
SHA-256: 12675c2c9b1a20fe70ac5a402a022438c64907f504429ac78d3e74ca65120fc4
font_01_sfnt_off0001292c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1292C 10360 bytes
SHA-256: 170b4b50437db2774c5701130d0db2b04693150c19428449f009f24169d0b6a2
font_02_sfnt_off00014c9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C9E 16288 bytes
SHA-256: 66b7d4ff2b5c5bb39a0ff5ea84122b7c7b7cdda1ba9b0b3a650452233c73d0d6

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