Malicious PDF — malware analysis report

Static analysis result for SHA-256 78c37057beb55e85…

MALICIOUS

PDF

78.7 KB Created: 2021-03-14 01:30:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 6eb727c96696ef112497c0a7e5db1603 SHA-1: 5f72f356d3297ba439f50dafd0a942aafbdb1b8e SHA-256: 78c37057beb55e85eb27f4e85edb71773ae7577fa94cc1afd933a85171ce38cd
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 0.9964

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://druttle.ru/123?utm_term=fire+emblem+three+houses+guide+book PDF link annotation
    • http://fafabil.getenjoyment.net/wuvegiw.pdfIn PDF document text
    • http://lorakuze.sportsontheweb.net/nipepepokolojewoloj.pdfIn PDF document text
    • http://vexasefagi.scienceontheweb.net/75758092409.pdfIn PDF document text
    • https://zogozunenu.weebly.com/uploads/1/3/5/3/135399222/2079465.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477379/normal_600ea6a3e783a.pdfIn PDF document text
    • http://novijixonusasu.mywebcommunity.org/online_converter_jpg_to.pdfIn PDF document text
    • https://zepafasamog.weebly.com/uploads/1/3/4/3/134361306/22cfd0333ee590e.pdfIn PDF document text
    • http://sazulido.medianewsonline.com/korebepezanixodid.pdfIn PDF document text
    • http://makelemeg.mygamesonline.org/allelopathic_effect_of_chromolaena_odorata.pdfIn PDF document text
    • http://kavelizopepi.mywebcommunity.org/physical_chemistry_notes_free_download.pdfIn PDF document text
    • http://juxowupekabaf.mygamesonline.org/ritemakererevewesugokike.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477637/normal_60388beb6782f.pdfIn PDF document text
    • https://bilunoxenaxu.weebly.com/uploads/1/3/4/4/134474733/sobisitatisa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468553/normal_6041aaad5c4fe.pdfIn PDF document text
    • http://mezogevap.mypressonline.com/jegisom.pdfIn PDF document text
    • http://fulukegoror.getenjoyment.net/zexowuwupedabekimasaduwiv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401555/normal_5fc6c6ae1ebf1.pdfIn PDF document text
    • https://rarasuxa.weebly.com/uploads/1/3/1/3/131398432/323602.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414335/normal_602f6ef94425e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://butaxogusevi.epizy.com/biomes_concept_map_answers_key.pdfIn PDF document text
    • http://dipagepe.atwebpages.com/jamiwiwuxuzofolarizafilum.pdfIn PDF document text
    • http://gixiluvigatekij.atwebpages.com/kenmore_upright_vacuum_accessories.pdfIn PDF document text
    • http://widifusi.myartsonline.com/womens_weight_loss_workout_plan.pdfIn PDF document text
    • http://kufekisawisewo.onlinewebshop.net/accumulator_hydraulic_system.pdfIn PDF document text
    • http://mimiwuzoxul.epizy.com/61973566530.pdfIn PDF document text
    • http://vigibuvene.epizy.com/western_digital_my_cloud_mirror_login.pdfIn PDF document text
    • http://gekolutewubel.myartsonline.com/83410810829.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_off0000f503.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF503 5188 bytes
SHA-256: 1cc62c0d913906034ce776374e319132bc23b35ab3dfcf261a4d484431201337
font_01_sfnt_off00010676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10676 10840 bytes
SHA-256: a899c4d77cfd2af9173cc29150a64ab1b321eba4949637db198175c77a0ee151

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