Malicious PDF — malware analysis report

Static analysis result for SHA-256 377af564a8b2e09e…

MALICIOUS

PDF

72.8 KB Created: 2021-03-06 05:40:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: f4a2e4149099b885d3d249417589408f SHA-1: dd29630bd1dd221dbfffa95c0755e81464d67b5a SHA-256: 377af564a8b2e09e084e64d2c16fd63e408b8553bbc8cb96e0466614fe7744f7
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/strik?utm_term=ilive+bluetooth+soundbar+remote PDF link annotation
    • http://gekenig.mywebcommunity.org/38096063651.pdfIn PDF document text
    • http://sait-ok.ru/mep_archicad_22mgam9.pdfIn PDF document text
    • http://zanovekolasin.mywebcommunity.org/xesexo.pdfIn PDF document text
    • http://manekobe.22web.org/manual_auscultatory_blood_pressure.pdfIn PDF document text
    • http://stat-index-co.com/zojivifivediraweso39wfk.pdfIn PDF document text
    • http://pusaburuku.22web.org/breakthrough_basketball_rebounding.pdfIn PDF document text
    • http://tepugorotewole.medianewsonline.com/que_es_liderazgo_transformacional_y_carismatico.pdfIn PDF document text
    • http://sqrab.top/73394808389e5q6c.pdfIn PDF document text
    • http://lidagejelotodu.22web.org/gnar_top_build_guide.pdfIn PDF document text
    • http://50offstore.info/super_8_plus_nes_emulatorthrya.pdfIn PDF document text
    • http://galajanexagaj.iblogger.org/yard_king_performance_8_27_snowblower.pdfIn PDF document text
    • http://rafupofamurawaf.mygamesonline.org/to_live_in_the_borderlands_means_you_literary_analysis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zivuneko.epizy.com/39442564301.pdfIn PDF document text
    • https://c4e42e93-254c-4ba8-b495-737f84002742.filesusr.com/ugd/ddb60a_96dcf44cf1524076a1d3077e5d7ef7f3.pdf?index=trueIn PDF document text
    • http://bufalirafuma.epizy.com/71925575177.pdfIn PDF document text
    • http://pixabexodexub.rf.gd/antivirus_para_android_gratis_apk.pdfIn PDF document text
    • http://fosudav.epizy.com/acoustic_guitar_background_music_free.pdfIn PDF document text
    • http://wikiwujekuloxok.rf.gd/tesarigefarulegigo.pdfIn PDF document text
    • https://a68e2ff5-bf17-48e3-82d4-ceb975b85758.filesusr.com/ugd/760101_a76378fc06fa4ccf956cc596b74e583c.pdf?index=trueIn PDF document text
    • https://e114ad41-1367-46fe-a5fd-427bf640f69d.filesusr.com/ugd/a63c55_fc73614f8bb641468f0cea424ea55793.pdf?index=trueIn PDF document text
    • http://rigexeleza.rf.gd/65795948072.pdfIn PDF document text
    • http://ruxunuweni.epizy.com/olympus_om-1n_35mm_camera.pdfIn PDF document text
    • https://711920be-b761-4f0e-a604-762b26663b16.filesusr.com/ugd/ffcbea_41978ac6589d4efb89af1e81e4fecdef.pdf?index=trueIn PDF document text
    • http://numaxap.epizy.com/the_basic_practice_of_statistics_5th_edition_solutions.pdfIn PDF document text
    • https://6363ce23-9394-4102-a476-7be320345719.filesusr.com/ugd/7c41c1_966387500cc545fab5195b1365ffa159.pdf?index=trueIn 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_off0000de09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE09 5200 bytes
SHA-256: 9133c54fe9cb910f1dc0d38edd03c1f357fcb4a364cb7f05a124784a22bb9fa5
font_01_sfnt_off0000ef87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF87 11084 bytes
SHA-256: 02a80222b2272f8e529c3dfb0d1374c0d53511db92dd92dfc2a5b147cd3a86f3

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