Malicious PDF — malware analysis report

Static analysis result for SHA-256 0978c82472657032…

MALICIOUS

PDF

73.4 KB Created: 2021-03-28 19:23:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 59e318dfcc652ae7e4aa7e796d544b0f SHA-1: d79e7de711f9bf3901a31a7f6323278fb557304f SHA-256: 0978c82472657032fc65d4acb7e3cbffcb173406d967f6d1f3c735cc824545d7
126 Risk Score

Malware Insights

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

This PDF document 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 pairing a Roku remote, suggesting a phishing or social engineering lure. The presence of numerous external URLs, many hosted on disposable domains, further supports a malicious intent, likely to redirect users to phishing sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ponafet.ru/strik?utm_term=how+do+you+pair+a+roku+remote+without+pairing+button PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4496592/normal_602050eb4644a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374852/normal_5fd0436744a30.pdfIn PDF document text
    • http://luchdobro.site/direct_variation_inverse_variation_and_joint_variation_worksheetxw3qj.pdfIn PDF document text
    • http://mutujejeturuduf.medianewsonline.com/novela_el_alquimista_de_paulo_coelho_resumen.pdfIn PDF document text
    • http://pressit.fun/zojerine370nm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412161/normal_5ff09a0c9db10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470975/normal_60298f2800a7d.pdfIn PDF document text
    • http://creditstar-kabinet.com/hepatic_cyst_icd_10fg6q0.pdfIn PDF document text
    • http://podipotekoi.ru/fefugesepobuxub1w2u.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://387a498e-9551-4239-9507-3183ba214552.filesusr.com/ugd/cd403b_f664c8ccbf7d44bda32e9893db6842e9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f8e98cf-885d-4073-aaf7-ea43548652dd/xusiragimulodewufimaniz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15e780a9-f155-4694-a58f-383725d3e0b5/93498409457.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c998ff53-018f-42d9-b5d4-360595f78be7/sufebov.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/retugaxux.pdfIn PDF document text
    • https://s3.amazonaws.com/baposivarabuj/warhammer_fantasy_roleplay_3rd_edition.pdfIn PDF document text
    • https://f405dec1-7f90-4f4c-a861-5286f67d0127.filesusr.com/ugd/ab922d_f3e3f8a51deb4ae2a3943fbf552ebd45.pdf?index=trueIn PDF document text
    • https://cf176ec6-4820-456b-adf9-61e5f06c968f.filesusr.com/ugd/43d598_e4097d3053234aadb87154c029bef973.pdf?index=trueIn PDF document text
    • http://wiloradakuno.onlinewebshop.net/85604806179.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df8b9ccf-6033-4664-93a6-8f8847a23860/plot_of_a_streetcar_named_desire.pdfIn PDF document text
    • https://9eaa565e-fb97-40b4-b096-d6760803f699.filesusr.com/ugd/55e2c6_dc4eb464d5d64911a3a1bf418901ad2a.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_off0000e01a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE01A 5520 bytes
SHA-256: fdf3895d2c5d3b96b2e6c65fd406526c147afd8d4aa061a75558d18c98828854
font_01_sfnt_off0000f2cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CB 10916 bytes
SHA-256: b8525151ca130f95350d7329d22ccbc38b9a7d64b59901f653b823e75edb5a31

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