Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1eac146e1bb13de…

MALICIOUS

PDF

77.1 KB Created: 2021-05-26 20:26:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b5fdb93c0b1d3cc5d06defffd365a97c SHA-1: 55d0cb22d9b7515dba4b2ba2cc482683d058e299 SHA-256: e1eac146e1bb13de7f60cc6123a27c1f298d8e9cf5a77c4b3111c63eeef5c97b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It contains a large number of external links, suggesting a link farm or redirection mechanism to malicious sites. The embedded URLs and the overall structure point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/strik?utm_term=programar+control+remoto+megacable+gdct-480t
    • https://static.s123-cdn-static.com/uploads/4404297/normal_5fdfc46b45458.pdf
    • https://nofabirudop.weebly.com/uploads/1/3/4/4/134455392/tisopajup_lisarax.pdf
    • https://static.s123-cdn-static.com/uploads/4459792/normal_5fdee3dd41b47.pdf
    • https://cdn-cms.f-static.net/uploads/4388280/normal_60464559c2bb8.pdf
    • https://vetaneje.weebly.com/uploads/1/3/4/7/134729364/7ed0a00.pdf
    • https://vewewiganivobob.weebly.com/uploads/1/3/4/8/134852084/naxar.pdf
    • https://static.s123-cdn-static.com/uploads/4373519/normal_60083e92ef1b0.pdf
    • https://cdn-cms.f-static.net/uploads/4493195/normal_60599a7167a71.pdf
    • https://cdn-cms.f-static.net/uploads/4481400/normal_605672360ef35.pdf
    • https://pezusadoti.weebly.com/uploads/1/3/4/5/134525395/2579446.pdf
    • https://static.s123-cdn-static.com/uploads/4378607/normal_5fde7376e0cdb.pdf
    • https://cdn-cms.f-static.net/uploads/4462362/normal_60466b92b3542.pdf
    • https://rojomitalo.weebly.com/uploads/1/3/4/4/134485393/f0baf7b7f.pdf
    • https://mojavopadagesit.weebly.com/uploads/1/3/5/3/135383036/wires_simesijuxos.pdf
    • https://jedopebo.weebly.com/uploads/1/3/4/8/134889916/nogawixosaf-bisanadal-wazegosuvajalu-govopever.pdf
    • https://cdn-cms.f-static.net/uploads/4416332/normal_603ced8c728fc.pdf
    • https://cdn-cms.f-static.net/uploads/4448124/normal_5fd0aaf14a169.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/1b5ac970-ee7e-48ce-9f15-eaf824318a5a/lujopodigudobivofeselep.pdf
    • https://uploads.strikinglycdn.com/files/7d1273f7-fcab-438f-a1ef-d23714c29db0/54914809317.pdf
    • https://uploads.strikinglycdn.com/files/4c9178fe-2c2a-4054-9604-66644c3b5df4/barbie_dreamhouse_adventures_game_free_download_pc.pdf
    • https://uploads.strikinglycdn.com/files/13dbfa13-d4c7-44fd-9ac7-92071dfb9eeb/libros_para_aprender_ingles_avanzado_gratis.pdf
    • https://uploads.strikinglycdn.com/files/06ab10d2-98e5-40f2-944d-5b5ee8dd8da0/sony_sound_bar_ht-ct380_ct780.pdf
    • https://uploads.strikinglycdn.com/files/7fa17381-81df-4140-9757-9fad808e48cf/big_nate_book_9.pdf
    • https://uploads.strikinglycdn.com/files/3374ed63-aa41-4ab0-849e-84fec4efe932/necchi_supernova_julia_service_manual.pdf
    • https://uploads.strikinglycdn.com/files/2015a014-9bcd-4531-a3a6-937ab8d38aa1/pentair_superflo_vs_energy_efficient_variable_speed_pool_pump_manual.pdf
    • https://uploads.strikinglycdn.com/files/45e5250f-888d-4902-bd12-768b2b9b11c3/zitaluvuzinaw.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec05.bin
4008bd8cd5d451b9c77de47abfa410c0dab7ab5726adc9a146d0ae34ae85b476		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC05 5680 bytes
font_01_sfnt_off0000ff52.bin
70b90b7ca87a2701d021894f60c8a11c30c50d7b2cfb0e8166d0f804e5a6fa12		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF52 11408 bytes

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