Malicious PDF — malware analysis report

Static analysis result for SHA-256 46fc94b87ce20568…

MALICIOUS

PDF

74.1 KB Created: 2021-02-13 19:27:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: c18e215b9e6b03765c8ad0eae59efe95 SHA-1: 1db2eebe44661b8d0372a6752f9420dd1f9587c3 SHA-256: 46fc94b87ce205683fc38c3451554d67e0ee7967673603434b71fa8c73dd1ee4
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded links that redirect to known malicious domains, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristics. The ML classifier also flagged this PDF with high confidence. The primary goal appears to be directing users to malicious websites, likely for phishing or to download further malware, aligning with spearphishing attachment tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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 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/wix?keyword=weekend+at+strahd%2527s+pdf In PDF document text
    • http://rerubin.space/botoxizip31tb.pdfIn PDF document text
    • http://karnaval.host/levels_of_organization_in_multicellular_organisms_worksheet6dghh.pdfIn PDF document text
    • https://cdn.sqhk.co/vakenuda/e6N8Fjj/tikfans_get_followers_likes_and_views_on_instagram.pdfIn PDF document text
    • http://reform-st.ru/289964213128cf5x.pdfIn PDF document text
    • http://gratoramaa.website/vmware_esxi_6._5_clientysi0h.pdfIn PDF document text
    • https://cdn.sqhk.co/perajomipe/ZhdAHSZ/star_wars_rebels_season_3_episode_3_cast.pdfIn PDF document text
    • https://cdn.sqhk.co/lozuzupadis/6mkBid3/black_wood_wallpaper_phone.pdfIn PDF document text
    • http://fdvsefwfrw.space/gojisajedezobemupupefure9jkey.pdfIn PDF document text
    • http://myvenza.ru/accp_guidelines_treatment_pulmonary_embolismvb07z.pdfIn PDF document text
    • https://cdn.sqhk.co/visukodo/cpiAsgg/flat_pack_cubby_house_kit.pdfIn PDF document text
    • http://cetly.xyz/fofaruxujolvcrh.pdfIn PDF document text
    • http://uanews.website/aquaterra_spa_owners_manualr6jh1.pdfIn PDF document text
    • https://cdn.sqhk.co/gisanewat/ffQidhb/4850787413.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/wulotugadag/60178099427.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/89578109970.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_off0000e5d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5D4 5208 bytes
SHA-256: d248c3430acd559e8a11bf222f59442f5d05f27cc9b21d248391a11662602396
font_01_sfnt_off0000f79d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF79D 10500 bytes
SHA-256: f5c26004eb491e793df744e86c6ceb1ead3dbbc3b132dee4d93ebd63d1e04300

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