Malicious PDF — malware analysis report

Static analysis result for SHA-256 a6bde631f17af63b…

MALICIOUS

PDF

84.4 KB Created: 2021-03-01 02:22:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 43a4d91a323cc238365398bca95e7bf0 SHA-1: 8879d1d27614b7c68bb0d816861bac87aa4e4a0d SHA-256: a6bde631f17af63bc2cd02897ced2f722721503a55e76853ed33a98d1b8759c5
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is a common tactic for phishing and malware distribution. The embedded URL and the ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and the presence of a malicious URL suggest it's designed to redirect users to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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/strik?utm_term=vizio+sound+bar+with+bluetooth In PDF document text
    • https://cdn.sqhk.co/temirikuji/Viehggd/jungle_adventure_super_world_victo_matos.pdfIn PDF document text
    • https://cdn.sqhk.co/bajipugotox/Ue4gdgd/15847117427.pdfIn PDF document text
    • https://cdn.sqhk.co/webepinovet/ihibfaj/super_dancer_chapter_3_episode_1_full_episode.pdfIn PDF document text
    • http://nenonazuf.scienceontheweb.net/braun_series_9_bed_bath_and_beyond.pdfIn PDF document text
    • https://cdn.sqhk.co/pibegufuxova/tigUgdu/closest_ice_cream_shop_near_us.pdfIn PDF document text
    • https://cdn.sqhk.co/bodegife/PNzqiiv/797862698.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/tosego/format_of_formal_letter_to_a_friend.pdfIn PDF document text
    • https://s3.amazonaws.com/resixexi/kixogevabetikutazoxom.pdfIn PDF document text
    • https://s3.amazonaws.com/xaliwalufoguni/bepovo.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/25759690832.pdfIn PDF document text
    • http://tuzuxutetug.atwebpages.com/how_to_set_up_harmony_650_remote.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/48487361084.pdfIn PDF document text
    • https://s3.amazonaws.com/rekorewexidiwo/what_is_the_norse_tree_of_life.pdfIn PDF document text
    • https://s3.amazonaws.com/xoguwavosuje/andhra_pradesh_district_map.pdfIn PDF document text
    • https://s3.amazonaws.com/sinadi/l_t_annual_report_2016-_17.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/jetoxixebatebom.pdfIn PDF document text
    • https://s3.amazonaws.com/vudivuzakal/sejixibifekepare.pdfIn PDF document text
    • https://s3.amazonaws.com/sixenogafopoj/46075173342.pdfIn PDF document text
    • https://s3.amazonaws.com/saxefi/getixalukafibab.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF56 5044 bytes
SHA-256: c5f170d13fc8dfef2f88f387d2398fd3b379694ea45f0958924b1dc3ddc3f08d
font_01_sfnt_off00011086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11086 10964 bytes
SHA-256: 9e2700c3275097895b99fa890be8160e2165c9c01aeca967f1c47c3e179892a4
font_02_sfnt_off000135d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135D0 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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