Malicious PDF — malware analysis report

Static analysis result for SHA-256 505315064ff1e3a8…

MALICIOUS

PDF

116.5 KB Created: 2021-04-07 00:05:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: b6f53ce1b20e9dc8702e5169f538bb96 SHA-1: 582a9590f4f795c2d8c3e4d4df615d7a5abbd071 SHA-256: 505315064ff1e3a8abb59f4210aa0fa13862927d88bad2d63cad4f78d46864f6
126 Risk Score

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 0.9998

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://dafemum.ru/strik?utm_term=what+is+aqueous+iodine+used+for PDF link annotation
    • http://lozejebivo.scienceontheweb.net/abbyy_transformer_full_crack.pdfIn PDF document text
    • http://pubgucbayim.com/25365047626jjl5k.pdfIn PDF document text
    • http://vipadobotisituz.mygamesonline.org/how_to_read_my_sunlife_card.pdfIn PDF document text
    • http://febirag.iblogger.org/nukopegajuwukozalokadeji.pdfIn PDF document text
    • http://euroshopmn.space/how_to_use_a_metric_engineer_scale_rulerga13q.pdfIn PDF document text
    • http://zoguponuwuxoli.medianewsonline.com/themes_of_macbeth.pdfIn PDF document text
    • http://milky-rp.space/dytto_barbie_girl_mp4uq02c.pdfIn PDF document text
    • http://sonasutos.mywebcommunity.org/42906623517.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2d130471-2a64-48ba-87cf-8f1e86c6acad.filesusr.com/ugd/9c43ec_ec615d641cb34f92bdc69846d37fd300.pdf?index=trueIn PDF document text
    • https://84daacc9-7e90-4c5d-b1ed-526950900c49.filesusr.com/ugd/73f3b0_51ed7d7703a0435a9aa59277c9be19f8.pdf?index=trueIn PDF document text
    • http://wugerubuvugox.myartsonline.com/nozufeg.pdfIn PDF document text
    • http://panexorumilogim.myartsonline.com/al_7075_properties.pdfIn PDF document text
    • https://b3a8b944-ddec-4d17-9b53-5a1c05c66d8c.filesusr.com/ugd/314503_ae8274be29f0441ea05ad48fac7869f6.pdf?index=trueIn PDF document text
    • http://motawow.epizy.com/circular_economy.pdfIn PDF document text
    • https://1ac5d900-0c69-4f12-8b1d-4e209472b8d2.filesusr.com/ugd/828753_61993fb45a8447fc9097801f5aa11b08.pdf?index=trueIn PDF document text
    • https://b595a6f9-6bcb-48d8-acfc-7cb8c696cf55.filesusr.com/ugd/21f311_be2f3f739e754277b162fe543bfec0aa.pdf?index=trueIn PDF document text
    • http://gobipumedijesi.epizy.com/mathematical_logic_a_first_course.pdfIn PDF document text
    • http://rofuvawitarul.atwebpages.com/phonics_vocabulary.pdfIn PDF document text
    • http://divejekojo.epizy.com/how_to_use_casio_fx-9750gii_for_calculus.pdfIn PDF document text
    • http://wipezusefoxilu.rf.gd/28213424300.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_off00018b46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18B46 5100 bytes
SHA-256: c288f4bf404e455cdca21f78ee6359327bc2699188bdc123007d291db06d1ae7
font_01_sfnt_off00019ca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19CA3 11220 bytes
SHA-256: a99fa3fc8b2bd25e6b47811fa419e809ab623218b82433ee2a2062b0c15e2705

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