Malicious PDF — malware analysis report

Static analysis result for SHA-256 0be284886fb6281d…

MALICIOUS

PDF

68.6 KB Created: 2021-02-10 04:21:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: cb8d874ac9bf17356ce5e99b32f197dd SHA-1: c6c3d83fb7ac8d1b67d0430a2f381eeea12bd018 SHA-256: 0be284886fb6281dbef9c9a786ccd78c327db43ae5ac8a54aa6ddf3bd3a04100
244 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wb?keyword=sp2%20hybridization%20pdf In PDF document text
    • http://fastcreditcheck.info/download_chin_tranh_v_ha_bnh1peta.pdfIn PDF document text
    • http://lyudi23.ru/dia_a_dia_fisica_y_quimica_2_eso_matkk56b.pdfIn PDF document text
    • https://xelewutoritawi.weebly.com/uploads/1/3/1/0/131070131/fupomokunilapow_farokezin.pdfIn PDF document text
    • https://cdn.sqhk.co/kixarozikej/ChhsH5n/goziverororinibur.pdfIn PDF document text
    • https://cdn.sqhk.co/munoforifuso/hjdv8yv/worapega.pdfIn PDF document text
    • https://cdn.sqhk.co/bidogefapo/fjhhhgf/diskdigger_photo_recover_app_download.pdfIn PDF document text
    • https://junafoxotoroj.weebly.com/uploads/1/3/0/7/130738975/6efa11704885e.pdfIn PDF document text
    • https://vinusipiwa.weebly.com/uploads/1/3/1/3/131381721/e4aaa17bf39b.pdfIn PDF document text
    • https://wogalipa.weebly.com/uploads/1/3/4/3/134316604/437a93ad5ad.pdfIn PDF document text
    • https://sutovuwoti.weebly.com/uploads/1/3/0/9/130968995/rizafuluxer-kigux-gakagon.pdfIn PDF document text
    • https://biwomewiwuxe.weebly.com/uploads/1/3/4/1/134131409/wuvirelezetav.pdfIn PDF document text
    • https://wetolobumusu.weebly.com/uploads/1/3/4/5/134579125/0ec03acfd5.pdfIn PDF document text
    • https://botabire.weebly.com/uploads/1/3/4/6/134629411/xusakipujarapu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sepuxukejobome.epizy.com/notification_sound_android_app.pdfIn PDF document text
    • http://zubeleboju.epizy.com/35359920204.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_off0000cef4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEF4 5448 bytes
SHA-256: 35e944bb9f877e8f104f1c18bb3d997294c9992d9ad38a5d37a25197b0d47399
font_01_sfnt_off0000e183.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE183 10980 bytes
SHA-256: 4264c8060307af483deea7839d5e73b08ed7404d03390ad25099c1bdbd7d9564

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