Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c24a1eb9352fc3f…

MALICIOUS

PDF

73.4 KB Created: 2021-03-09 09:12:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 98b0b5c86cc7f6868336cd47a7b55e0c SHA-1: bb8365ab4ad51b43de757a81e4ef8f3d55e759a7 SHA-256: 8c24a1eb9352fc3fc43121c1a0520000d0919c53080e6e1b5fc572c8c8dc41e9
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, with one heuristic identifying it as a link farm on disposable hosting. ClamAV and ML classifiers strongly indicate maliciousness, specifically as a phishing or trojan delivery mechanism. The embedded URLs suggest the primary goal is to redirect the user to potentially malicious content hosted on external domains.

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 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://jacksth.ru/123?utm_term=draper+esprit+plc+annual+report+2018 PDF link annotation
    • https://zemutixo.weebly.com/uploads/1/3/4/8/134865820/fojal.pdfIn PDF document text
    • http://pagavopalubutu.scienceontheweb.net/kezoba.pdfIn PDF document text
    • https://povarudoro.weebly.com/uploads/1/3/5/3/135324530/e456eb.pdfIn PDF document text
    • http://wivevadevenumet.mywebcommunity.org/memabik.pdfIn PDF document text
    • http://gamerefiv.22web.org/zogivolemiget.pdfIn PDF document text
    • http://xulubapatoso.scienceontheweb.net/51297380903.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://genenapukiral.epizy.com/zubawixozivanojipu.pdfIn PDF document text
    • http://getilikitisowo.epizy.com/kuradapolu.pdfIn PDF document text
    • http://kosezofejesuxef.atwebpages.com/walmart_black_friday_map.pdfIn PDF document text
    • http://nakarajibap.myartsonline.com/how_to_replace_a_ge_mwf_refrigerator_water_filter.pdfIn PDF document text
    • https://s3.amazonaws.com/fevobelijogal/wuxijajinebus.pdfIn PDF document text
    • http://xidesaso.rf.gd/26303151510.pdfIn PDF document text
    • http://rupiroliwon.epizy.com/romeo_and_juliet_analysis_act_4_scene_1.pdfIn PDF document text
    • http://fopatumupun.epizy.com/nefuv.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibudasagas/fajizezabofeve.pdfIn PDF document text
    • http://zegemipufe.epizy.com/sistem_pencernaan_manusia_adalah.pdfIn PDF document text
    • http://monufojama.rf.gd/35370974291.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dbe9282-c7f1-4e21-8013-22b4d08f50fc/burger_king_2_for_69_order_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39999ff5-c216-4e15-aa04-d3e3ae91fae0/in_the_company_of_dragons_pathfinder.pdfIn PDF document text
    • http://xugivazule.rf.gd/xorosabirag.pdfIn PDF document text
    • https://s3.amazonaws.com/wajibile/96443844779.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e12c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE12C 5448 bytes
SHA-256: b36a8c2a098fb907e5e29de4ab5264cdc121d1e097511bd41c2e5796ffe6e0c4
font_01_sfnt_off0000f3c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C5 10736 bytes
SHA-256: edebccb302e90f5594d7a7204f8b90e8f1f543e1a06f43e0ced8863e1c5626a7

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