Malicious PDF — malware analysis report

Static analysis result for SHA-256 7558f29fd40b69ab…

MALICIOUS

PDF

93.4 KB Created: 2021-04-02 08:57:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: a08ede65858e4edea595aa5649274a4c SHA-1: 5e28074ca5c05d6704f0d897d684de7418baa5fc SHA-256: 7558f29fd40b69abb4d85d92ae37c76074d4bf17df0fd4a7c756e898fd833082
162 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure, specifically 'https://dafemum.ru/123?utm_term=listable+template+wordpress'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of embedded URLs and the redirector link suggest a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://dafemum.ru/123?utm_term=listable+template+wordpress In PDF document text
    • https://cdn.sqhk.co/vituxezij/kgcjcid/naturalizer_boots_amazon.pdfIn PDF document text
    • http://vimobewawulipiz.mypressonline.com/zadog.pdfIn PDF document text
    • https://cdn.sqhk.co/befozaxulot/agfific/2545449718.pdfIn PDF document text
    • https://cdn.sqhk.co/teduwugevoki/hgdnstb/21096539712.pdfIn PDF document text
    • https://cdn.sqhk.co/votojuxosaf/Bgcifgh/84271834896.pdfIn PDF document text
    • http://wutopezogegusi.getenjoyment.net/blasting_licence.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407994/normal_601b9a7f199d9.pdfIn PDF document text
    • https://cdn.sqhk.co/senogewuki/dAJsWzP/super_mario_world_yellow_switch_palace.pdfIn PDF document text
    • https://cdn.sqhk.co/ziveluki/hfhj9hf/biwipotisujiwixowubow.pdfIn PDF document text
    • https://cdn.sqhk.co/sefibenip/hDKX2gd/roy_worldwide_height.pdfIn PDF document text
    • https://cdn.sqhk.co/tegimatararo/Ba9sico/69935223893.pdfIn PDF document text
    • https://cdn.sqhk.co/pafevola/hxGje5M/descargar_prop_hunt_portable_apk.pdfIn PDF document text
    • http://xokapik.mywebcommunity.org/muxaxogubebitegofegiten.pdfIn PDF document text
    • https://cdn.sqhk.co/pufowuvikij/GckWhbC/3172976152.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377414/normal_600bcf3d98ad8.pdfIn PDF document text
    • https://cdn.sqhk.co/kovezozeseg/jeig4ja/aaa_logo_design_software_free.pdfIn PDF document text
    • https://cdn.sqhk.co/pogadidotilu/2tPq2he/11589456130.pdfIn PDF document text
    • https://cdn.sqhk.co/lituxopevuk/VjjggoP/8211387537.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/fd6cd4e1-0fbb-4cb8-92d4-af991dc0f596/71610902255.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fd42c83-e1df-486c-8530-fc568c08d5c1/96588599032.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8bf87c3-3b38-4288-ad54-633c50d36bc8/possessive_nouns_worksheets_3rd_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f06d108e-e03b-4b9c-83f5-c809e96bbe6b/how_to_get_a_csr_jobs_in_india.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_off00012c9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C9B 5276 bytes
SHA-256: 9b43dfc35cb7e32127e28b4583a74f3093cf5cb4820194f8e2998cb56e0be928
font_01_sfnt_off00013e7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E7C 12136 bytes
SHA-256: df084e8409f73a71e98a4aaaab23c776a032bf0569d3a97c5f7340638460b3ba

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