Malicious PDF — malware analysis report

Static analysis result for SHA-256 1faed901e91df612…

MALICIOUS

PDF

75.8 KB Created: 2021-03-26 13:24:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: d845030cc2a39f1e26d6c7c7d7164bd3 SHA-1: 68e07070f02cf5520dfd787e1c858dfd2b5ab71c SHA-256: 1faed901e91df6127b8fca3375f45afadfcc3b3fc2e1a2d777e8724cb6fe524c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external URLs, including 'https://dugedepap.ru/123?utm_term=adolphus+tips+guided+reading'. The presence of embedded URLs and the nature of the heuristics suggest an attempt to redirect users to potentially malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://dugedepap.ru/123?utm_term=adolphus+tips+guided+reading PDF link annotation
    • http://dragonflysagewellness.com/area_and_perimeter_worksheets_grade_6hsu09.pdfIn PDF document text
    • https://cdn.sqhk.co/tibakekavero/iiwjgWG/ultimate_soccer_football_apkpure.pdfIn PDF document text
    • https://wekupadafar.weebly.com/uploads/1/3/5/3/135315244/jatimigazafew_jafigamedolisa_finux_wugelud.pdfIn PDF document text
    • http://italystore.pro/how_to_draw_flow_chart_in_word_2007pv9gh.pdfIn PDF document text
    • http://gamowenugeg.sportsontheweb.net/gujarat_samachar_bhavnagar_today.pdfIn PDF document text
    • http://itsamorem.com/garmin_gpsmap_60csx_maps_freecqleg.pdfIn PDF document text
    • https://moxitimufetumo.weebly.com/uploads/1/3/4/0/134040580/4341419.pdfIn PDF document text
    • http://lerob.info/pinobon12am.pdfIn PDF document text
    • http://subonus.ru/how_to_create_a_program_evaluation_planw5mnn.pdfIn PDF document text
    • http://burrrhey.tech/the_comprehensive_infp_survival_guidum7al.pdfIn PDF document text
    • http://rabota-plus.club/mifosadegopasitobdi45.pdfIn PDF document text
    • https://cdn.sqhk.co/bijukipuj/hdhfshg/klondike_solitaire_free_no_ads.pdfIn PDF document text
    • https://cdn.sqhk.co/vadavenaw/2jgihyV/emergency_bell_sound_download.pdfIn PDF document text
    • http://wegansit.space/551857030163fnwc.pdfIn PDF document text
    • https://cdn.sqhk.co/xaranoraf/3hcghjh/85912633429.pdfIn PDF document text
    • http://finuxezanasa.mygamesonline.org/92685640342.pdfIn PDF document text
    • http://euroshopmn.space/pigofenaqhsi.pdfIn PDF document text
    • https://diwuxofemuji.weebly.com/uploads/1/3/1/4/131407179/2dac1.pdfIn PDF document text
    • https://mesajenijapab.weebly.com/uploads/1/3/0/9/130969967/mokofi.pdfIn PDF document text
    • http://zuduwamani.mypressonline.com/41530765815.pdfIn PDF document text
    • http://rejawulomov.mywebcommunity.org/45363578698.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/301327b4-80b3-4b6f-814a-cc54c0fb1f7d/31479010214.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1db10a9a-ec1d-473a-a1b5-e97a521dce7a/10100121104.pdfIn PDF document text
    • http://farovosodiwes.atwebpages.com/jobog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59aa48e2-620d-47ad-9f41-9b93266a4bf0/713932915.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_off0000ebed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBED 5212 bytes
SHA-256: 9adc32423ddf27fd3f5c439e58920b903b4b8161957610f17ff15a2406094f7a
font_01_sfnt_off0000fd9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD9E 10508 bytes
SHA-256: bc7f7c5d2a365ac89c094dff8c6b2bcd83fb4e6f45216627fa54b48fc7765aad

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