Malicious PDF — malware analysis report

Static analysis result for SHA-256 d818906548a8bc23…

MALICIOUS

PDF

76.8 KB Created: 2021-03-31 19:52:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 30d74c651396a8c087d6699133d1cccb SHA-1: b1402a5b228b1c475375540e50a8d64aa6ce7e2c SHA-256: d818906548a8bc234d40dfb3ae7c67b650fdd8e8d78cfdc59abda842b212b598
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains embedded URLs that redirect to a link farm, ultimately leading to a site offering a 'ccna routing and switching pdf book'. This is a common lure for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or trojan delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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/award?keyword=ccna+routing+and+switching+pdf+book PDF link annotation
    • http://canonsburglake.org/healthy_smoothie_recipes_with_spinach_and_fruitealau.pdfIn PDF document text
    • https://cdn.sqhk.co/dolitife/fjbjjja/97801852937.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371025/normal_605db7210e0d5.pdfIn PDF document text
    • https://cdn.sqhk.co/lukejisuvawe/eauihjb/ww2_bombers_images.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382629/normal_602228cb912f7.pdfIn PDF document text
    • https://cdn.sqhk.co/numovasovev/anTZxih/ranked_voting_system_online.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487005/normal_6009a7a04008b.pdfIn PDF document text
    • http://amorexpo.com/what_are_the_un_sustainable_development_goals_and_why_are_they_importanti6tn3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375086/normal_5fcbdd69a0dc3.pdfIn PDF document text
    • https://cdn.sqhk.co/nadetajagupe/iibzZhd/64200778485.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4b742ce-2b28-4fe5-9ba3-8cd09bf641a9/3935184671.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6f9f9411-3625-4d0f-b37d-a159223972ac/casio_wk-3000_release_date.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba25281a-97cb-4006-be56-40768f190b3e/skyworth_55_inch_smart_tv_price_in_philippines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/522f1e49-45b2-4f93-851d-2afea0768f87/60134083426.pdfIn PDF document text
    • http://zutaturusix.myartsonline.com/biology_textbook_class_12.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5c65018-1329-4614-a83b-9005099b7777/how_do_i_download_ms_paint.pdfIn PDF document text
    • http://pudolajuji.atwebpages.com/govupub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa3c5af0-570e-4844-b7c1-62b79a7c3279/rubariza.pdfIn PDF document text
    • http://vilepobafomunow.atwebpages.com/abbyy_transformer_3._0_crack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f243d3fd-ef52-4888-937f-919ed2e9da5d/jilapatovete.pdfIn PDF document text
    • http://nubibubimalepik.atwebpages.com/99678328126.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/042d24f7-faaa-4b79-b191-95c8f35bf3b2/hallelujah_chorus_christmas_song.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_off0000ed9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9B 5584 bytes
SHA-256: d488efc522d1c9a522a22738623f1d79fc6032f6550b3823ee8d70d98b3920aa
font_01_sfnt_off0001009f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1009F 10764 bytes
SHA-256: 88cde0e3b1a8473db1692462e4e5c52951123e2e559fab539c484eb88bdbef81

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