Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfcde992d160a219…

MALICIOUS

PDF

71.7 KB Created: 2021-02-14 22:24:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 41080cb264d5e244a2c647613ed9e3e5 SHA-1: 1c1f4f8f347a779ad1874c3937d7304574554b00 SHA-256: bfcde992d160a2199c2bd78bdb5fb9123997fce92654f520b33bff76fd5c3833
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://leonvi.ru/123?utm_term=policy+memo+template+word PDF link annotation
    • https://cdn.sqhk.co/xutazazo/gjlHKge/gixaritipurexoximogun.pdfIn PDF document text
    • http://hookup153.space/dlink_di_524_default_passwordz5ge3.pdfIn PDF document text
    • http://nat-fru.space/29484254234geooe.pdfIn PDF document text
    • https://bejeselujolir.weebly.com/uploads/1/3/1/3/131379719/d6c3312bd73184a.pdfIn PDF document text
    • http://igclienteam.com/c3_and_c4_plants_examplesnb1b4.pdfIn PDF document text
    • https://fuviwamirami.weebly.com/uploads/1/3/5/3/135351498/zuzupojomezi-kupiwitakeze-dafemizib-buwegowaku.pdfIn PDF document text
    • https://cdn.sqhk.co/zobelekivix/NHigwhj/home_gym_assembly_cost.pdfIn PDF document text
    • http://karaulovlife.site/vikekogrv23.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/sigobija/earthquake_news_report_philippines.pdfIn PDF document text
    • https://s3.amazonaws.com/gogonof/spotify_music_er_android_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/cambridge_audio_dacmagic_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/avast_antivirus_pro_crack_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/vipinib/tesco_dishwasher_rinse_aid_data_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/domain_and_range_worksheet_answers_algebra_1.pdfIn PDF document text
    • https://s3.amazonaws.com/jopomodilamego/multiplying_binomials_worksheet_with_work.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_off0000dd7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD7C 5236 bytes
SHA-256: 3dd29acd43607a27245161045f9d982c191d321389d4b336e7a3b6c7e63c078a
font_01_sfnt_off0000ef49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF49 10256 bytes
SHA-256: 6d2a2880158cd6f06ca583921e7d3bbaf040c05428c3b44b3cf1cfaee424ef98