Malicious PDF — malware analysis report

Static analysis result for SHA-256 e937ba1ec9dd2f0e…

MALICIOUS

PDF

64.3 KB Created: 2021-02-15 17:43:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 5064193ae5657bceb0f2ce8ce62ff186 SHA-1: 23cda8cabd8c18ef9d1760f99557ca7e5a23d038 SHA-256: e937ba1ec9dd2f0e661a6902ab2d0e75289f4d4cd73edf87bf7a8e34e25905b5
224 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as malicious, including a critical rating for linking to known malicious redirector infrastructure. The document contains numerous links to disposable domains, suggesting a link farm designed to lure users to potentially malicious sites. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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.
  • 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://crophysi.ru/strik?utm_term=soundlogic+xt+true+wireless+earbuds In PDF document text
    • http://health-top.ru/major_functions_of_human_resource_managementqfink.pdfIn PDF document text
    • http://sallles.ru/perudivojopagewujevoz8jmx4.pdfIn PDF document text
    • http://byt-upak.ru/air_canada_customer_service_contact_informationqy870.pdfIn PDF document text
    • http://boevoenlp.com/470503729968ufny.pdfIn PDF document text
    • https://cdn.sqhk.co/foropogajag/DOgdjg2/24026430806.pdfIn PDF document text
    • http://securespot.ru/rimor408cz.pdfIn PDF document text
    • http://securityofusersdevicesonline.site/life_simulation_games_switche91dr.pdfIn PDF document text
    • https://cdn.sqhk.co/fedovipawe/hhigfje/stack_ball_blast_through_platforms_download.pdfIn PDF document text
    • http://paypallsecurity.com/zalojokidaputalemogasenu96iti.pdfIn PDF document text
    • https://cdn.sqhk.co/semoxumid/bhhL1if/ginuvumuxiputedabofopaxu.pdfIn PDF document text
    • http://svoydvalend.xyz/29399312428w7u22.pdfIn PDF document text
    • http://dedekuwetom.iblogger.org/free_boss_baby_invitation_template.pdfIn PDF document text
    • http://voicebftyi.com/wedunibanebodawomanigorir78sq4.pdfIn PDF document text
    • https://cdn.sqhk.co/fodexuxefeba/fshbbjf/hardwood_rivals_basketball_apk.pdfIn PDF document text
    • http://setifol.66ghz.com/polycyclic_aromatic_hydrocarbons.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jenofabejuvokag.epizy.com/68539505601.pdfIn PDF document text
    • http://bividit.rf.gd/pexunezidafomata.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_off0000baf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBAF7 5512 bytes
SHA-256: 0b0c43e2cfe6b2e3b0db9464aecaf8bc5e1ccde569488d598d9216be991c2ced
font_01_sfnt_off0000cdd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDD5 11324 bytes
SHA-256: 3b70f66bb56667115963963d4092ea1e9c9ab4280c3b07ab3c5f491154a08784

Open this report in the interactive analyzer, or submit your own file for analysis.