Malicious PDF — malware analysis report

Static analysis result for SHA-256 6768c700b4c30a5a…

MALICIOUS

PDF

71.5 KB Created: 2021-03-09 02:03:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 502f0bb2a8f0d25cc0cabe03ca8bab82 SHA-1: 3131c65b8adc6cbde5192d66bb5c84714549448f SHA-256: 6768c700b4c30a5a8f612bdf2ec30344a35ec36da024fbd562ecde14f5d24f9d
126 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ClamAV as a phishing trojan. It contains multiple external URIs, including one pointing to 'jumiwimov.ru' with a keyword suggesting a lure for repair manuals. The PDF's structure and the presence of numerous links on disposable hosting indicate a link farm designed to redirect users to malicious content. No scripts were extracted, but the overall pattern suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://jumiwimov.ru/wix?keyword=jaguar+xf+repair+manual PDF link annotation
    • http://tepifugamokeg.medianewsonline.com/winchester_model_94_30_wcf_saddle_ring_carbine.pdfIn PDF document text
    • https://cdn.sqhk.co/goronikel/hiWDghL/wukitodeze.pdfIn PDF document text
    • https://cdn.sqhk.co/nobipajami/ljjCGap/barcelona_events_september.pdfIn PDF document text
    • https://bunoworerut.weebly.com/uploads/1/3/1/4/131438217/8662703.pdfIn PDF document text
    • https://cdn.sqhk.co/kigowabalo/hYjahjS/31367946374.pdfIn PDF document text
    • https://cdn.sqhk.co/nugizape/jaidngZ/jaredexomuripexukowiv.pdfIn PDF document text
    • https://lififotepul.weebly.com/uploads/1/3/4/3/134339298/wetanurozejusur.pdfIn PDF document text
    • https://zokolukesowi.weebly.com/uploads/1/3/0/7/130776120/xuxafopixuzogo.pdfIn PDF document text
    • https://kamabaxi.weebly.com/uploads/1/3/4/6/134650964/7108193.pdfIn PDF document text
    • http://vuwiwetidajin.mywebcommunity.org/digitech_trio_plus_review.pdfIn PDF document text
    • http://bodipok.getenjoyment.net/calendario_julio_2020_colombia.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/bda0dd98-7195-43d3-aafb-49173773eb11/52881957543.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/68723631316.pdfIn PDF document text
    • http://kofujuluzode.epizy.com/avital_ronell.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b55a3358-2c54-4ae6-bc77-9a0adaa92bc0/64240002655.pdfIn PDF document text
    • https://s3.amazonaws.com/lefemijip/autodesk_3ds_max_2010_crack_free.pdfIn PDF document text
    • https://s3.amazonaws.com/ropidadegaxut/molojogimulutud.pdfIn PDF document text
    • http://kubazemaxem.epizy.com/low_poly_rocket_template.pdfIn PDF document text
    • http://kizuwopo.epizy.com/lmcc_part_2_study_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16715ad9-e9f8-4aee-ac23-28911a062cdd/o_que_mais_cai_em_histria_no_enem_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/597e869f-7e26-422a-b0db-8ece53da32e6/35825380959.pdfIn PDF document text
    • http://bezafesu.rf.gd/nuvetikolidi.pdfIn PDF document text
    • https://s3.amazonaws.com/tobito/72080603659.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_off0000da7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA7E 5100 bytes
SHA-256: 090185f03d1d00f19d622c2404d66b8dc67b09d3eeb49de236a79b4c33f7e837
font_01_sfnt_off0000ebd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD6 10708 bytes
SHA-256: ee20f866c94e7589c64de3ce1fef83779ebe7520c33fb4d2b5f299efd68c890e

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