Malicious PDF — malware analysis report

Static analysis result for SHA-256 48388839a5b33a7f…

MALICIOUS

PDF

64.1 KB Created: 2021-01-02 17:04:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 2075252945974b83fb5ed692211e3c03 SHA-1: 9ff1b852e6dbc925508755cdbfe918b702526fae SHA-256: 48388839a5b33a7fa34668ceb7295ec515688da114f38f88afc974a9d6af2d69
254 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.
  • 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.
  • 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://gettraff.ru/shook?utm_term=brochures+royal+caribbean+international In PDF document text
    • https://cdn.sqhk.co/latusetime/Doggcha/sound_effects_library_adobe.pdfIn PDF document text
    • https://zesoxomilojul.weebly.com/uploads/1/3/4/0/134018604/deruzosu.pdfIn PDF document text
    • https://welavofewefose.weebly.com/uploads/1/3/0/8/130813025/7309349.pdfIn PDF document text
    • https://nufivoba.weebly.com/uploads/1/3/4/0/134017608/dd95a985fb1f82d.pdfIn PDF document text
    • https://nugaginidej.weebly.com/uploads/1/3/4/4/134475369/sitibuweri_lowexireg_paluka.pdfIn PDF document text
    • https://kebedemozi.weebly.com/uploads/1/3/0/7/130775588/wutural.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/gedexim/broken_vow_karaoke.pdfIn PDF document text
    • https://s3.amazonaws.com/midizaxopazeji/analemmatic_sundial_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fe18ee0-c8a8-4605-b5b9-acde8cf46960/kingkiller_chronicles_wiki.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/student_portal_dps_login_detroit.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/96960663773.pdfIn PDF document text
    • https://s3.amazonaws.com/povelenavuviw/almeria_airport_live_flight_information.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a26d2426-37ec-4e3d-865d-db2ea9bac872/tableau_server_admin_guide_9._0.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/sukemozaka.pdfIn PDF document text
    • https://s3.amazonaws.com/lekezaru/29332069468.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_off0000bcbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCBC 5180 bytes
SHA-256: 089473c1a0c3c051f2cd1e90267a772dedb1691674703a76b47491c74287dcfa
font_01_sfnt_off0000ce5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE5B 10284 bytes
SHA-256: 2f50a0fa33c963ec6670e96285e89b28c002c899f47c5e077f7cd9d82e02643d

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