Malicious PDF — malware analysis report

Static analysis result for SHA-256 08e42bcfbb73dfaf…

MALICIOUS

PDF

87.3 KB Created: 2021-03-23 20:40:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: e6e8d6553a77811f8276f27424473875 SHA-1: 28bcb2928b5607c6ef7ec8f60d0f7c0f2835a3ca SHA-256: 08e42bcfbb73dfafbf0007616686b29171051683ccd95214346f6d4ceb44ebf2
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with the primary one being a lure for a quiz, suggesting a phishing or scam attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for multiple links, reinforcing the malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs strongly suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://mezovuduw.ru/award?keyword=are+you+smarter+than+a+fifth+grader+questions+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4476282/normal_601880ec53bcc.pdfIn PDF document text
    • https://koruguliduni.weebly.com/uploads/1/3/4/8/134896859/4980052.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463791/normal_5fe8815b67bac.pdfIn PDF document text
    • https://zadukali.weebly.com/uploads/1/3/5/3/135340438/bec6f8734d06620.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460446/normal_600be34fd0c17.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415322/normal_5fc9a86d9eab5.pdfIn PDF document text
    • http://sarupunojupud.sportsontheweb.net/fitefujegubesixijodafuse.pdfIn PDF document text
    • http://xizapataruxeku.mygamesonline.org/14266210002.pdfIn PDF document text
    • http://govajidenemases.22web.org/what_is_the_theme_of_the_three_billy_goats_gruff.pdfIn PDF document text
    • https://vuzavadakugodo.weebly.com/uploads/1/3/4/8/134857872/pedekosaroka-nusagovu-bobaxoxusaroxi.pdfIn PDF document text
    • http://nigoguno.scienceontheweb.net/51744008111.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484612/normal_5fd78516128bf.pdfIn PDF document text
    • http://koxivesuvif.mypressonline.com/dyson_ball_animal_pro_upright_vacuum_vs_shark.pdfIn PDF document text
    • http://warowusavi.mywebcommunity.org/free_suzuki_eiger_400_manual.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://92fed17e-af34-466b-b3fe-38cd9ef27699.filesusr.com/ugd/192d58_aab7dd7002d44c13aa5436e33885dac9.pdf?index=trueIn PDF document text
    • https://9d76d0c6-5807-43ac-a2ba-7b4112d1a20a.filesusr.com/ugd/5cd33b_017789c7407548b19eb72c233bff7de3.pdf?index=trueIn PDF document text
    • http://sijadogif.atwebpages.com/small_business_success_factors.pdfIn PDF document text
    • https://04a9e765-cf69-4035-9b9a-998d8fb4e692.filesusr.com/ugd/8c5016_e03cfadeb9b64b778a86dd41b62c908e.pdf?index=trueIn PDF document text
    • http://sijekovurodubo.rf.gd/anatomy_and_physiology_of_pain.pdfIn PDF document text
    • http://punugituk.epizy.com/62691852771.pdfIn PDF document text
    • https://a8a70d16-e3f0-4805-b115-4d8c62c40b57.filesusr.com/ugd/82e28d_5531a5da17b54240870ab38beea43978.pdf?index=trueIn PDF document text
    • http://muzeduv.rf.gd/95962299285.pdfIn PDF document text
    • http://kosigasarem.epizy.com/gebexusi.pdfIn PDF document text
    • https://44879a12-c10a-431c-a98a-7de142752d0f.filesusr.com/ugd/bb4607_9a569ba0b7284bcdb0c8c01cb96b0f55.pdf?index=trueIn PDF document text
    • http://pavabiza.atwebpages.com/banking_awareness_capsule_affairscloud.pdfIn PDF document text
    • http://noroved.myartsonline.com/97738259972.pdfIn PDF document text
    • http://luregaw.onlinewebshop.net/toruvokufesaxorupinekuru.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_off000114fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114FC 5640 bytes
SHA-256: d88d985a7c3ed8835425f8c506583bc5f304aab25be947a0dfad4aea7f601a75
font_01_sfnt_off000127ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127FF 11616 bytes
SHA-256: 615166892b53337c8d81c365b6391f9632b8d09f6b31bac8e2d4d18a14587161