Malicious PDF — malware analysis report

Static analysis result for SHA-256 a18bf28bacfddf70…

MALICIOUS

PDF

69.1 KB Created: 2021-03-20 07:48:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e55c230cdacf9346ee16b52e37a69499 SHA-1: 57f7ff4c7d65c78c36a86fc2cc4558aee53c255b SHA-256: a18bf28bacfddf70f624d5d0a0d5188c8aa597f6d6ea665ce482bc83a1eec8f3
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 0.9996

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://resalured.ru/123?utm_term=charms+blow+pops+allergen+information PDF link annotation
    • http://vesajob.getenjoyment.net/definition_of_self_esteem_by_rosenberg.pdfIn PDF document text
    • http://xuroriwonufuz.scienceontheweb.net/keurig_k10_mini_plus_brewing_system_white.pdfIn PDF document text
    • http://leziwazedo.mypressonline.com/dj_artist_profile.pdfIn PDF document text
    • https://kilutiwoxit.weebly.com/uploads/1/3/1/6/131636983/wukuvovuzanusow-ludobesuwunim-jizalur-mamidowokasove.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479902/normal_604fe134865ca.pdfIn PDF document text
    • http://afracheat8.xyz/velodrome_bike_weightdkjbh.pdfIn PDF document text
    • https://remafubununabex.weebly.com/uploads/1/3/1/4/131437283/pukisuzirekamit.pdfIn PDF document text
    • http://fofiwafajelerax.sportsontheweb.net/52252015093.pdfIn PDF document text
    • https://vadutebo.weebly.com/uploads/1/3/4/8/134889136/rowozetelaxakovo.pdfIn PDF document text
    • https://donurufeto.weebly.com/uploads/1/3/4/8/134898164/jutitinejobuvona.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403140/normal_604c9ad073ae6.pdfIn PDF document text
    • http://zabovawupe.mypressonline.com/sat_math_syllabus.pdfIn PDF document text
    • http://julasopupep.iblogger.org/76797554234.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370989/normal_5fe2ca058e8a6.pdfIn PDF document text
    • http://roflan.site/spotify_onto_computerc27gu.pdfIn PDF document text
    • https://jexepasevotapak.weebly.com/uploads/1/3/1/6/131606223/529326.pdfIn PDF document text
    • http://tujubafi.getenjoyment.net/lofomagadulijidesaxir.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://koxogulu.rf.gd/linkers_and_connectors_exercises_with_answers.pdfIn PDF document text
    • http://fedonefekipide.myartsonline.com/84166324195.pdfIn PDF document text
    • http://sazasewugekupej.onlinewebshop.net/85690069600.pdfIn PDF document text
    • http://vupileloluxus.rf.gd/quadratische_funktionen_lsen_mit_pq-_formel.pdfIn PDF document text
    • http://manosotidokef.myartsonline.com/autodwg_to_dwg_converter_full.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_off0000d0dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0DC 5452 bytes
SHA-256: 12cdac0a021d44fcadce0f11c8d2349bafc9d6a7153021d589ec6b1247f9d23d
font_01_sfnt_off0000e34a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE34A 10336 bytes
SHA-256: 6bb8557f609c628b7568a9d6f6b81ff11be49da839ac4ae686e801255ec054eb

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