Malicious PDF — malware analysis report

Static analysis result for SHA-256 26b2f055b897e488…

MALICIOUS

PDF

73.2 KB Created: 2021-02-13 05:59:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 983e4daf3b3cf40a70f67c04c4aa9929 SHA-1: ce613a50e4e3e643b45d85408c4ed6c8897f9099 SHA-256: 26b2f055b897e4880b61491db48256ede99de523e78198a2538e43aace7605d8
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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://yafferge.ru/wix?keyword=chapter+9+chemical+quantities+answers In PDF document text
    • http://pafekusiwajida.66ghz.com/hemophilia_prophylaxis_guidelines.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471091/normal_5fcf4100f2f85.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446789/normal_5fe3965a53df8.pdfIn PDF document text
    • http://euroshopmn.space/semi_formal_dress_code_tie54a05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481065/normal_600ba27ae78ae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409801/normal_60045c55be339.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468836/normal_6001baa6eb55c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427313/normal_5fd6eff31a8d6.pdfIn PDF document text
    • http://gerakaxow.22web.org/soldering_brass_sheet_metal.pdfIn PDF document text
    • http://dulexip.22web.org/85231750468.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482399/normal_6002f0a34d21a.pdfIn PDF document text
    • http://mavurelaro.22web.org/raman_abdullah_movie_songs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379964/normal_5fc7d1c24dddc.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
    • http://juzatapanosuwi.rf.gd/bertec_treadmill_manual.pdfIn PDF document text
    • http://sisawujeza.rf.gd/sumerian_art_forms.pdfIn PDF document text
    • http://kagiwabiluwotel.epizy.com/37449672683.pdfIn PDF document text
    • http://lixaxezubor.rf.gd/70295166828.pdfIn PDF document text
    • http://nosekaj.epizy.com/vokukawupuxaxozurizizo.pdfIn PDF document text
    • http://xugonowelimije.epizy.com/famugirep.pdfIn PDF document text
    • http://wonenuw.epizy.com/zofefumevuxarit.pdfIn PDF document text
    • http://kigetivizaru.epizy.com/story_of_seasons_fp_guide.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_off0000d2c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2C0 5340 bytes
SHA-256: e866e95b59868becae0f2c7410ae2db8d4c47b14218850885fa3488e1bda1b8d
font_01_sfnt_off0000e4db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4DB 10732 bytes
SHA-256: 4f36537abdc4472dc2e52f934176f6d84ae9bea040af7634073018ddde94e8f5
font_02_sfnt_off0001094f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1094F 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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