Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8980b21fc406a62…

MALICIOUS

PDF

77.4 KB Created: 2021-03-04 15:40:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 2c1889f6bc51eb94cdb3137f5845d2da SHA-1: 195d00786ddd4f08c5737c1360a3a5b3f6361dcb SHA-256: f8980b21fc406a62f52cfe7f32fc08750d26815bc5c4672cc2d9e12799117356
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous external URIs, many hosted on disposable domains, strongly suggests a link farm or phishing attempt. The ML classifier also indicated a high probability of maliciousness. While no scripts were explicitly extracted, the PDF structure and URI patterns are consistent with phishing lures designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://golowaki.ru/award?keyword=how+do+i+love+thee+elizabeth+barrett+browning+interpretation PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4453329/normal_6020968e25015.pdfIn PDF document text
    • http://remont-kvartir-otzyvy.moscow/why_the_catholic_bible_has_73_booksr3cx7.pdfIn PDF document text
    • http://nanonewe.scienceontheweb.net/bolenapax.pdfIn PDF document text
    • http://lbaranaydin.com/zirupelogidiluln5x8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481994/normal_5fe4eb0d66389.pdfIn PDF document text
    • http://xewopixomimam.22web.org/speed_queen_washing_machine_prices_south_africa.pdfIn PDF document text
    • http://mihetos.xyz/rejelsoszi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480589/normal_5fce820dae0de.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374976/normal_600370599e9ce.pdfIn PDF document text
    • http://limowoduramu.iblogger.org/sonarqube_can_not_process_dependency-_check_report.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376103/normal_601c7b6fd2a51.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jibogifimot.epizy.com/can_you_get_a_link_to_the_past_on_switch.pdfIn PDF document text
    • http://paxubar.rf.gd/duxofunuludofarobesoj.pdfIn PDF document text
    • https://4f65501f-cdae-4966-b9db-49b15ad9d196.filesusr.com/ugd/52b593_af050129f6994a3c8a71bb8a8fc58983.pdf?index=trueIn PDF document text
    • http://mopezuvo.epizy.com/niwekim.pdfIn PDF document text
    • http://zelejiv.epizy.com/nogoritutojusutojita.pdfIn PDF document text
    • https://ad843f61-c544-48d7-8cfb-3c048b9edb46.filesusr.com/ugd/0dd9ed_32ba9a3696a24996ab625263f783e0c7.pdf?index=trueIn PDF document text
    • http://makakanow.onlinewebshop.net/how_much_do_union_plumbers_make_an_hour.pdfIn PDF document text
    • http://lufefavi.epizy.com/facebook_business_description_template.pdfIn PDF document text
    • http://mukanebesiva.atwebpages.com/bapiliroxo.pdfIn PDF document text
    • http://zitovidenelanus.rf.gd/11249031929.pdfIn PDF document text
    • http://livofos.epizy.com/xixoxoladodamurazabivi.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_off0000f2af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2AF 5344 bytes
SHA-256: 4b911d11a6e6c3f1bd7a99532139838d1181c33f2691d949c333ccdbabe57499
font_01_sfnt_off000104ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104EE 10196 bytes
SHA-256: 81e9f701f599f378de82289b742a41ad3500ba73b9a81b5c03d51cd02533c43c

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