Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b9fd483666c92c4…

MALICIOUS

PDF

77.8 KB Created: 2021-04-01 09:43:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5d68af3b996f2627bf84d7cef80c7955 SHA-1: 705da732083e74e12dfcdfb86ae72b4705debdaa SHA-256: 0b9fd483666c92c418a21aad08a8496cf4adc9238074619a188422ed4c4292d5
96 Risk Score

Malware Insights

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

The PDF document contains an embedded URL that, when clicked, leads to a phishing site. The document body, though heavily obfuscated, appears to be a lure related to printer maintenance. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://zajinet.ru/strik?utm_term=how+to+fix+a+paper+jam+in+a+canon+mx490+printer
    • http://sudilufib.getenjoyment.net/dirt_devil_power_max_pet_upright_vacuum_reviews.pdf
    • https://cdn.sqhk.co/zegareguw/Qjagc2E/real_skate_3d.pdf
    • http://xunarepozufuz.mygamesonline.org/skinnytaste_cookbook_amazon.pdf
    • https://cdn.sqhk.co/goronikel/WYCghNV/88542634861.pdf
    • https://cdn.sqhk.co/kimamena/QjghcaH/fonelakugutezopupapu.pdf
    • https://cdn-cms.f-static.net/uploads/4376372/normal_602b8801d707d.pdf
    • http://funasowuto.getenjoyment.net/upsc_mains_sample_answer_sheet.pdf
    • https://cdn-cms.f-static.net/uploads/4365998/normal_60357adbba25a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/mexijegedakol/81614985561.pdf
    • https://uploads.strikinglycdn.com/files/42b860ba-84c0-4ffd-a8b6-7bda735b01cb/23129322213.pdf
    • https://uploads.strikinglycdn.com/files/a419e4b1-df90-47e9-b206-bd2dfb1610eb/how_to_connect_sony_mdr_zx750bn.pdf
    • https://s3.amazonaws.com/pizivurapab/wezurabadesosabadopoberuk.pdf
    • https://uploads.strikinglycdn.com/files/fd24f265-fa4b-48f6-aeb0-c212ed8c701a/setuduwakefas.pdf
    • https://s3.amazonaws.com/rejiner/76315767356.pdf
    • https://uploads.strikinglycdn.com/files/e3b99cdf-ef22-4ef1-a51f-1c57b08c0a42/fantastic_mr_fox_ash_gay.pdf
    • https://s3.amazonaws.com/sixenogafopoj/dream_meaning_of_dead_parents.pdf
    • https://s3.amazonaws.com/guxosa/are_nys_drivers_license_renewals_extended.pdf
    • http://lusajafimaneru.myartsonline.com/white_christmas_margarita_punch.pdf
    • https://s3.amazonaws.com/vogubivajavofu/balupu_movie_telugu_songs.pdf
    • http://kafotafuvodalix.onlinewebshop.net/cannery_row_novel.pdf
    • https://s3.amazonaws.com/xomudufe/how_to_eat_paleo_without_losing_weight.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_off0000f193.bin
26c440d0c696f7dc209741aa6e185d52a4ff7fab9197e91f3fb19fc732742ccf
pdf-font-stream PDF embedded font (sfnt) at offset 0xF193 5536 bytes
font_01_sfnt_off00010473.bin
cf99129c04458071ad4a13340600bdcdbc5cb301bfecd17c11d98fbc879c3487
pdf-font-stream PDF embedded font (sfnt) at offset 0x10473 10888 bytes