Malicious PDF — malware analysis report

Static analysis result for SHA-256 236a1ecc2f9bc1aa…

MALICIOUS

PDF

77.4 KB Created: 2021-05-06 10:18:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 37ecfe76e48f03c117cca9fd1f0d0f02 SHA-1: 278e1601ab770fc8b4b1fa5f8466486c44f20028 SHA-256: 236a1ecc2f9bc1aa165210b6017277b7c9b8e88500d24f24174e1928c15cdf00
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with several pointing to disposable hosting and potentially malicious domains, suggesting a phishing or malware distribution scheme. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating the document is part of a link farm on disposable hosting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://lozipotod.ru/strik?utm_term=dell+poweredge+r710+power+specs PDF link annotation
    • http://fdvsefwfrw.space/dawasigenaruvoxefaselol3xl2h.pdfIn PDF document text
    • http://firstsecu-paypal.com/transposer_un_texte_au_prsent_cm1gzfg7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369506/normal_5fe6c8d993768.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468551/normal_6043251bad0ec.pdfIn PDF document text
    • http://ganilopafepe.iblogger.org/northwest_territory_vacation_home_tent_manual.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369907/normal_5fff6b367995d.pdfIn PDF document text
    • http://mritzoliver.design/eso_magicka_glyphf6iyx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417119/normal_604e968a3ad3b.pdfIn PDF document text
    • http://fabermanufacture.ru/sync_contacts_with_google_androidjt6hm.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488560/normal_602795bdbc631.pdfIn PDF document text
    • http://igonlinesupport.com/proform_xp_580_treadmill_partstphcz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jidibavozajo.epizy.com/anghami_4._3._22_mod_apk.pdfIn PDF document text
    • https://f61a8d15-835b-4c36-a3db-e4ead73ab13f.filesusr.com/ugd/e9f5f3_070c381bd2bb44bc836411c90335d8fa.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fde3449c-9a53-43d2-a655-62f18b51472b/schlage_keyless_entry_factory_reset.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/587823f8-729b-49ae-a0e5-49609647926b/be8252_basic_civil_and_mechanical_engineering_notes.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/cheat_sheet_sql_injection_owasp.pdfIn PDF document text
    • https://5a1138df-423b-4a5d-a7c7-36223740754e.filesusr.com/ugd/a72fa8_40b9dbd5ebf54544a518ec599b31691e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc022179-d44e-40f3-ac69-249d96b09ec2/pawagoragowoj.pdfIn PDF document text
    • https://s3.amazonaws.com/zalomi/ananya_pandey_image.pdfIn PDF document text
    • https://s3.amazonaws.com/bawalidamovidud/pulerozikuwalataweb.pdfIn PDF document text
    • https://7893bdd6-41e4-48f6-9953-3a636dfb5d61.filesusr.com/ugd/c5c63b_2cee91fa931b49e78b16721d66224d46.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fikuvine/xojutosodolulos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da373362-da47-4473-9d4a-a3e807f5e5ee/befuzezin.pdfIn PDF document text
    • https://9f349447-249b-4747-956a-316fe86e371b.filesusr.com/ugd/d2b720_da0b3b6b2aa845c6be7b34d91b28e54a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9d23e81-f8f3-47a9-b717-4302235b2083/how_to_reset_parental_control_on_tv.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_off0000ed86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED86 5396 bytes
SHA-256: 70879e7280e0542634295a473249a33470eb23d922a9b96c5d0f3f51362545d4
font_01_sfnt_off00010018.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10018 12160 bytes
SHA-256: 9248f0cff5405b77dac1a584df033865c37a77cb1832c94538425533dd8c4df2