Malicious PDF — malware analysis report

Static analysis result for SHA-256 c04fd423cbdfed1c…

MALICIOUS

PDF

74.4 KB Created: 2021-03-24 16:14:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 5dc373b51260e3ebf66333f8d30778ab SHA-1: 1952766befcb3c3bbf234ea54c2a5680383da72b SHA-256: c04fd423cbdfed1ce50a0534e280df597cd88f56383c498c6253cddb6c4f65a5
126 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The PDF contains numerous embedded URLs, with one specifically pointing to a link farm on disposable hosting, suggesting a phishing or redirection attempt. The presence of external URIs and the overall structure align with common phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://kuzutuzo.ru/wix?keyword=fate+of+the+norns+runes PDF link annotation
    • https://pesilanolaz.weebly.com/uploads/1/3/4/3/134330173/zitigebegevaw_piwilogemedoraz_sadov_firudupeduvuvi.pdfIn PDF document text
    • http://nesobaka9.xyz/kenmore_series_100_washer_wont_go_past_wash_cyclea35my.pdfIn PDF document text
    • https://satalediveli.weebly.com/uploads/1/3/4/0/134018026/bcbaf1396.pdfIn PDF document text
    • http://wejnpowk.space/44760186951j97ea.pdfIn PDF document text
    • http://lavkavkusa.store/pijabesowe808ma.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://aabf49e0-5477-4fd2-8456-a986ef8f2a87.filesusr.com/ugd/9e14ca_5c569025b59646ac8e19b68541b1ba1b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb128577-1c00-45d0-8847-d038bebecc92/falora.pdfIn PDF document text
    • https://s3.amazonaws.com/kosipefojaw/oracle_ilearning_quiz_answers_section_4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4104b0b8-a36b-44ff-9021-98354a3402a2/michel_foucault_books_in_chronological_order.pdfIn PDF document text
    • https://d21da297-2d1c-4020-882f-059d99c29dc9.filesusr.com/ugd/3724a2_059daf9b92a142fbade7ca79c2d5af80.pdf?index=trueIn PDF document text
    • https://ad843f61-c544-48d7-8cfb-3c048b9edb46.filesusr.com/ugd/0dd9ed_1d4260c83f234824817ea9fa89e0fdb7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/36d43b9e-c274-44cc-bd2f-0fe60358afd5/4466258134.pdfIn PDF document text
    • https://s3.amazonaws.com/xupovobejanam/ptc_thingworx_studio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07b27a68-790b-4eae-863f-e8039e1c6036/casio_g-shock_ga-100cb-1a.pdfIn PDF document text
    • https://6f465708-eb37-4ee2-8658-ebeec6cd93ea.filesusr.com/ugd/4bb103_dece6e5c320c4ed193b9d50bee1083ce.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/timeziso/59812424226.pdfIn PDF document text
    • https://s3.amazonaws.com/bajapovogam/vcf_cutter_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/visisosufuzonafagogexo.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/22357141822.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/affdb6cf-e56e-4dcb-af75-0fd7d8fcb284/dexulaz.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_off0000e7e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E4 4776 bytes
SHA-256: a16ad9fe9b9a98dbd050889c33dbdc216a2183020ab17c620faec986e4a2e67f
font_01_sfnt_off0000f81e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF81E 10656 bytes
SHA-256: 71d6811fd3ad1441a470ebb17446095718e8f4ee7d4ecba8fe7f41a1f7cd66db

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