Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6ee545112ead1cb…

MALICIOUS

PDF

78.5 KB Created: 2021-04-03 13:43:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: c168bcc4e4d5f252de5898dc3b34d9ee SHA-1: 95cce8a188770f7b38efbeebafd2140407993cb9 SHA-256: e6ee545112ead1cb938dba9bbf271ddfc280ada41797b4ba279d717444664067
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are hosted on disposable domains, indicating a link farm or phishing attempt. The primary URL, 'https://zajinet.ru/strik?utm_term=what+does+a+blinking+green+light+on+a+smoke+alarm+mean', suggests a lure to a potentially malicious site. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://zajinet.ru/strik?utm_term=what+does+a+blinking+green+light+on+a+smoke+alarm+mean PDF link annotation
    • https://cdn.sqhk.co/bevoroxur/3ogdAWW/92830241821.pdfIn PDF document text
    • https://cdn.sqhk.co/weruvewo/ghliigj/fobokagemumop.pdfIn PDF document text
    • http://pabujazinebubip.22web.org/34842324175.pdfIn PDF document text
    • https://cdn.sqhk.co/xusarukave/cidmHgc/jejuwuleboveretog.pdfIn PDF document text
    • https://cdn.sqhk.co/fukafodifi/cibPijk/spacex_rocket_launch_january_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/vegedusovo/gdgiP5O/march_of_empires_war_of_lords_strategy_guide.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a0f88182-e1f9-4a9c-ba22-d5ce004c6985.filesusr.com/ugd/2f3216_4d182036cc124156813729cf799eae65.pdf?index=trueIn PDF document text
    • https://c72a6d71-2fad-4f5a-8b7a-a7c165485bce.filesusr.com/ugd/a4966f_0b44ad3aad5b4fa1895bda7254a8633e.pdf?index=trueIn PDF document text
    • https://3568c1c9-c281-4b9a-9ea9-d5d291e0176b.filesusr.com/ugd/e5d8db_77a729f6ea094d9b9c8bb5e9146ff0c8.pdf?index=trueIn PDF document text
    • https://9e1b5e4e-b4ab-405b-8fdf-b3b6d7b19c28.filesusr.com/ugd/94ea38_96071214921c4e628f5234bc98c65ba2.pdf?index=trueIn PDF document text
    • http://sexotuwido.rf.gd/labofilezabibevowofopobi.pdfIn PDF document text
    • http://mabagojovas.epizy.com/google_maps_platform.pdfIn PDF document text
    • https://aefbb2f1-1cfc-4a48-aab2-d72547d84173.filesusr.com/ugd/2f3ac6_b7daff0d98b643bd9d0e505b866b9877.pdf?index=trueIn PDF document text
    • http://vopogelos.epizy.com/crossfit_workouts_at_home_with_rower.pdfIn PDF document text
    • https://e222b685-7c7f-4cee-b050-218328c89257.filesusr.com/ugd/c0232f_1b017aef4366404c9cd7d9dc5d554cfa.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/zuwarik.pdfIn PDF document text
    • https://e192e36c-395d-4660-9df6-aa7aed00c30a.filesusr.com/ugd/3aee12_e2f60817a70b414e8fcafb2df40f41a1.pdf?index=trueIn PDF document text
    • https://33c7e2ec-32fc-4676-a642-9d95a4379e01.filesusr.com/ugd/622218_ce6a63174fc547a3a2ee2e28cbb7d88d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/negonanopix/64384683901.pdfIn PDF document text
    • https://0e818273-c791-4c7a-b20f-750474b78fe4.filesusr.com/ugd/362633_ca176a6b01c24ec5b94026adcbc870dd.pdf?index=trueIn PDF document text
    • https://8c56b32b-3398-45d6-9c0b-b55146621f16.filesusr.com/ugd/6924eb_8937b949388044188b6c23249cdb1b41.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/xojemozamuguxedelav.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_off0000f437.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF437 5456 bytes
SHA-256: 3d027fafca7b291a59587fdcdf43d1aa63ac38f53aa07d50dd6a71806250561f
font_01_sfnt_off000106a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106A7 11000 bytes
SHA-256: 56109ce4a9939621a50d1f5c749dfe4500606329f3d179fcd495a3edebee006f