Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fc8849852090309…

MALICIOUS

PDF

75.5 KB Created: 2021-01-23 17:27:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 6eafbaedf26a60f62346aa0e2ac2e860 SHA-1: d395c54375ce9cf2e88e3ae5cc02e7953ddb28f9 SHA-256: 2fc88498520903099749eba1b8846935511a4e9e520e76db20827d1e7d560093
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://yafferge.ru/123?utm_term=sprayway+stainless+steel+cleaner+reviews In PDF document text
    • https://static.s123-cdn-static.com/uploads/4370062/normal_5feea4af02d65.pdfIn PDF document text
    • https://cdn.sqhk.co/foletesubuf/mjcgiid/chop_chop_fruit_one_piece_legendary.pdfIn PDF document text
    • https://cdn.sqhk.co/futevanu/iKTxjjp/66798675996.pdfIn PDF document text
    • https://mufisifarugevap.weebly.com/uploads/1/3/4/5/134595961/vowojoxomarozur_gojuwikalamara_wovoridixubizik_kukozo.pdfIn PDF document text
    • https://site-1177736.mozfiles.com/files/1177736/solid_color_wallpaper_pastel.pdfIn PDF document text
    • https://site-1176273.mozfiles.com/files/1176273/man_utd_transfer_news_today.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402706/normal_600a1d9b55a3e.pdfIn PDF document text
    • https://ligizedafovawu.weebly.com/uploads/1/3/2/6/132680967/2787259.pdfIn PDF document text
    • https://cdn.sqhk.co/madumubo/CvhiLm9/iowa_farmer_kills_wife.pdfIn PDF document text
    • https://cdn.sqhk.co/kikolibub/bcgi7hb/vikaw.pdfIn PDF document text
    • https://cdn.sqhk.co/kimefutif/KFhhRhb/28655477516.pdfIn PDF document text
    • https://zujamapetot.weebly.com/uploads/1/3/1/3/131381682/kifanurakipu.pdfIn PDF document text
    • https://nimaxosonoj.weebly.com/uploads/1/3/4/8/134897368/2177727.pdfIn PDF document text
    • https://wukelefitifaka.weebly.com/uploads/1/3/4/8/134882985/3755759.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vibasujefir/64207082251.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_off0000ea37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA37 5284 bytes
SHA-256: 9214a9d609cae8fc5760aec714cd06c12c55c4300dda258337493da76584978b
font_01_sfnt_off0000fc59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC59 10864 bytes
SHA-256: f34715403fd1ab66e2e06f2be919ef73caa22be8ff0cedcda520b88558fd1dee

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