Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f2f99f33a09cf78…

MALICIOUS

PDF

89.4 KB Created: 2021-05-28 16:11:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c0c6d9058b56ac374f3d9c9a5ec76704 SHA-1: aecd38b38b4b8bb3fecd47ca917037adfc09a2ba SHA-256: 2f2f99f33a09cf789a2b569be83012db3762ef5d52b118b7412cc116c943fc88
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9967

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/strik?utm_term=what+does+a+blinking+red+light+mean+on+a+samsung+tv PDF link annotation
    • https://memesuxiti.weebly.com/uploads/1/3/4/6/134635319/wanasig-luxetuzegireba-xuvonolijigu-ripipilanag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366351/normal_6041ea235592a.pdfIn PDF document text
    • https://rofubedojatedo.weebly.com/uploads/1/3/4/5/134586725/d09522b9e461.pdfIn PDF document text
    • https://disepijov.weebly.com/uploads/1/3/1/4/131438002/777d6a2cff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421049/normal_603f20ff18e26.pdfIn PDF document text
    • https://notupazepikinis.weebly.com/uploads/1/3/4/3/134382888/lutujediniz.pdfIn PDF document text
    • https://nojarotawufa.weebly.com/uploads/1/3/4/3/134313922/sexowofovulotamosipe.pdfIn PDF document text
    • https://zuladaziduvixu.weebly.com/uploads/1/3/0/7/130740320/c6084dc196d.pdfIn PDF document text
    • https://bemetapijulew.weebly.com/uploads/1/3/1/4/131437656/bisasetaxufipoxikona.pdfIn PDF document text
    • https://wabalolosezuluf.weebly.com/uploads/1/3/4/4/134462862/f5400.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489730/normal_5fca695b105f4.pdfIn PDF document text
    • https://sikefenuvip.weebly.com/uploads/1/3/4/0/134012601/b175e0a9648b271.pdfIn PDF document text
    • https://rixekozezoba.weebly.com/uploads/1/3/4/6/134609597/vuxisafi_tudodirozin_poradefugujoli_vixoko.pdfIn PDF document text
    • https://pifelisadejo.weebly.com/uploads/1/3/4/8/134884126/2b7c0a8a.pdfIn PDF document text
    • https://waronovubuwige.weebly.com/uploads/1/3/4/6/134631102/ximutivutunuza.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4531523/normal_5fcaaa13c25ef.pdfIn PDF document text
    • https://wavopotajulaja.weebly.com/uploads/1/3/4/6/134631105/lekesagifivomut-jifajedi-damig.pdfIn PDF document text
    • https://lixagomifele.weebly.com/uploads/1/3/5/3/135323016/4d83d.pdfIn PDF document text
    • https://rakawixedisika.weebly.com/uploads/1/3/5/3/135324789/9979717.pdfIn PDF document text
    • https://pozemake.weebly.com/uploads/1/3/0/7/130776760/71e368.pdfIn PDF document text
    • https://makezuxakoje.weebly.com/uploads/1/3/0/7/130739015/muduvamugoxuzu.pdfIn PDF document text
    • https://juwimifabofif.weebly.com/uploads/1/3/4/3/134369341/wumimipukawe.pdfIn PDF document text
    • https://mawajajapok.weebly.com/uploads/1/3/4/3/134353668/buxalisivekujal.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/67ecbd9a-9ca0-44ad-8060-576e50e7fbc4/intex_krystal_clear_sand_filter_pump_for_above_ground_pools_12-inch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8548e8dc-5543-4587-8f94-765e7ea7764c/lunowaxexawasitapoweripa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c88564b-2adc-4130-9a9d-5a95667a3149/huebsch_washer_key.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_off00011e3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E3B 5516 bytes
SHA-256: e7183512df45b505bf3e82949cc37df14868fd12322ac13adc925c988691fbdb
font_01_sfnt_off000130e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x130E0 11572 bytes
SHA-256: 87ece8fd0762997158f7ae7e40dc58932a8cc1eac1d077e9a607bc9d37319365

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