Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4c74e84ba1dd7ba…

MALICIOUS

PDF

98.0 KB Created: 2021-04-08 05:57:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 8b65f25b92328be9fdd38f63070725de SHA-1: 45f5982173fba1983ff354fd9bb96873bf508796 SHA-256: f4c74e84ba1dd7bad8a6e06ebe08bb7562acc10c268962cfbab8641b70da8d8b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9994

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=minecraft+pc+2019+free PDF link annotation
    • http://creditscoretracking.info/fipitejopenanifinbw28.pdfIn PDF document text
    • https://cdn.sqhk.co/datawafag/5qhijKk/among_us_imposter_hack_mod_apk_download.pdfIn PDF document text
    • http://libralab.digital/18742457787domjr.pdfIn PDF document text
    • https://cdn.sqhk.co/kavuzoda/cuHgfPu/1585754644.pdfIn PDF document text
    • https://cdn.sqhk.co/nixafusoda/Ihh2Jie/las_vegas_reviews_during_covid.pdfIn PDF document text
    • http://dujoxizuzepofom.iblogger.org/certificate_of_achievement_template_psd.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://uploads.strikinglycdn.com/files/98caf846-a5e3-44f8-8ada-3970f2a26ccb/can_you_keep_a_secret_synopsis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/839a3ae2-9271-4329-89bc-570101aa2e6c/8996762471.pdfIn PDF document text
    • http://nowavef.epizy.com/zedipuwujirawer.pdfIn PDF document text
    • http://rerivumisiso.rf.gd/93207007806.pdfIn PDF document text
    • http://zuwosopawekaz.rf.gd/business_studies_a_level_notes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80873f33-3547-4d9f-861e-b7571f32314a/mary_rowlandson_captivity_narrative_answers.pdfIn PDF document text
    • http://gemimixobisuju.epizy.com/52802153278.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44f5995b-6133-4b93-b110-df414a793241/what_schools_offer_real_estate_courses_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/662180c7-fd50-4960-94f0-a787f76199d4/95466858004.pdfIn PDF document text
    • https://s3.amazonaws.com/tinivukedeta/fojopenoledefavufebotemal.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/bafikufoligi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16cc48ee-c04d-47f4-9c8a-dbdd514f1055/45919983561.pdfIn PDF document text
    • https://s3.amazonaws.com/sagotomagin/wekenirezimovexuf.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/17293911256.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef437a2c-b36a-4ed4-a570-67d3932bb972/24425888122.pdfIn PDF document text
    • https://s3.amazonaws.com/xijilesuzuxo/vunofopi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013557.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13557 4964 bytes
SHA-256: 1f6e5602504c6e4833bc9f617534a459bc3772d6eca7a5fb2d7628936bda13a6
font_01_sfnt_off00014641.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14641 11352 bytes
SHA-256: 7cdcb21a979daa5a67be55e8cb75106064414feebb7d0d1b500db492dc6efe29
font_02_sfnt_off00016ce8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16CE8 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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