Malicious PDF — malware analysis report

Static analysis result for SHA-256 284df4829b87c22c…

MALICIOUS

PDF

65.6 KB Created: 2021-02-24 04:03:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 2b6686b752fff80401b84067ec861fa9 SHA-1: 8f97fc6bc5c7e894a3d40361b2b5623628363a53 SHA-256: 284df4829b87c22ca28d678b8eb2da23d57832de5fadb5bd739efebd52edb76f
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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://jottigo.ru/wix?keyword=practice+1-8+perimeter+circumference+and+area+worksheet+answers PDF link annotation
    • https://cdn.sqhk.co/medujebukoma/GieUTM4/lynx_lake_lodge_boulder_junction_wi.pdfIn PDF document text
    • https://pupaxuge.weebly.com/uploads/1/3/4/0/134096873/5887042.pdfIn PDF document text
    • https://soxoxalumowaju.weebly.com/uploads/1/3/4/7/134768556/5593eaadfcb08.pdfIn PDF document text
    • http://wepovak.iblogger.org/pikisowilitejipefotunukut.pdfIn PDF document text
    • https://cdn.sqhk.co/rogudokives/aXgehh8/mario_kart_8_nintendo_switch_instructions.pdfIn PDF document text
    • https://cdn.sqhk.co/segevenujuka/SijVXjf/dragon_ball_legends_best_pvp_team_2019.pdfIn PDF document text
    • https://zulijijala.weebly.com/uploads/1/3/0/7/130740393/xabakiwinug.pdfIn PDF document text
    • https://cdn.sqhk.co/ziriziwebu/jijnhhf/wivijiginuvij.pdfIn PDF document text
    • https://dapodufez.weebly.com/uploads/1/3/3/9/133997146/fotukejuj.pdfIn PDF document text
    • https://repugonajipivup.weebly.com/uploads/1/3/0/8/130814926/9907117.pdfIn PDF document text
    • https://linepofikoleku.weebly.com/uploads/1/3/4/4/134492010/6781791.pdfIn PDF document text
    • http://losadodika.22web.org/aiou_challan_form_for_reappear_in_workshop.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/voxulija/lidapevufejesipisak.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/main_khiladi_tu_anari_movie_3gp.pdfIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/what_is_the_religion_of_china_today.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b739.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB739 5680 bytes
SHA-256: 4528f8da9067ce7169f92943c51a1fcf5a6a0d2f80aa62c8fe66ef4953ec4805
font_01_sfnt_off0000ca79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA79 9428 bytes
SHA-256: 63a91698c19fec7cb8072f9d0e1dc6d56fd1ec2e46796f33b339b6b6d2e04ed5
font_02_sfnt_off0000eaa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA0 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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