Malicious PDF — malware analysis report

Static analysis result for SHA-256 5546ae692f5e29cc…

MALICIOUS

PDF

71.1 KB Created: 2021-02-21 00:17:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: bde4004a571e9dac83210cdb9ccf51d3 SHA-1: e3421a444be6fe86e302e60fe5b0f779afd715a1 SHA-256: 5546ae692f5e29ccc76a8a4ab938d4e2d73b910981ce90b35419f0aa1bd3d10e
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. The document body, though heavily obfuscated, contains text related to 'resetting a garage keypad clicker', which aligns with the external URI found, suggesting a lure. The presence of numerous external URIs, many on disposable domains, further supports a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/strik?utm_term=how+to+reset+garage+keypad+clicker PDF link annotation
    • http://reduslimitalia-ufficiale.site/xokiguxet7tyyu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369769/normal_5fe6336a2c077.pdfIn PDF document text
    • http://dayzcommunity.info/725726548659x87b.pdfIn PDF document text
    • http://bostpolamos.site/pairing_plantronics_backbeat_go_2muu0f.pdfIn PDF document text
    • http://tk-pobeda.site/6.0_diesel_performance_upgradeshxulp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366653/normal_5ff58c4c2d8ff.pdfIn PDF document text
    • http://distornyup.site/ragalusisuzowigatalelajaj3y26.pdfIn PDF document text
    • http://findssldz.xyz/fagor_dishwasher_parts_manualasfc6.pdfIn PDF document text
    • https://cdn.sqhk.co/letonolomo/jjjbifV/rakoritoberegomexew.pdfIn PDF document text
    • https://cdn.sqhk.co/fedugaxoloz/h3hhchb/deredakolojibupuzajedalup.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwefuxab/chgpLje/depazebogaripifisod.pdfIn PDF document text
    • https://cdn.sqhk.co/niririga/ajebuhf/mod_para_minecraft_1._16_2.pdfIn PDF document text
    • http://datingsexchat.site/clack_0948_water_softener_manualtgt5i.pdfIn PDF document text
    • http://fb-pageunderreview.com/estimating_sums_and_differences_of_decimals_worksheetsj1yre.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/kopisigapub/5490863645.pdfIn PDF document text
    • https://s3.amazonaws.com/vovuzize/wofif.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_off0000d72a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD72A 5460 bytes
SHA-256: 5d03a8a89216726c5fa042b11bc63ccb7d3ca7ba3f65a4cd975acfb8d97870a7
font_01_sfnt_off0000e9e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9E6 11148 bytes
SHA-256: 83f6a4410a57a220c18f8df7e310f8b2893c5fd2673ed9cf4fca2dafb05c5b93

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