Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c4da8c7e6768856…

MALICIOUS

PDF

66.1 KB Created: 2021-02-14 13:57:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 988a1a73a65358934b58cf0783932dc2 SHA-1: 05cea97dbde8650442ed4cf48dfdce0559e5e2c2 SHA-256: 1c4da8c7e6768856da9fe43aaea6a05e96e94494c48a4fa7461def20f8d6b3e4
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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=the+slope+game+unblocked In PDF document text
    • https://cdn.sqhk.co/jimumakevaji/ijjcicC/dotuxuzesogixotinelunip.pdfIn PDF document text
    • https://cdn.sqhk.co/dusujukakal/ghigjjf/disney_princess_dress_up_trunk.pdfIn PDF document text
    • https://cdn.sqhk.co/gobuwovuv/S7hgVwh/burn_your_fat_with_me_fg_full_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/vabalogu/etuhhaf/boston_donut_truck_fast_food_cooking_game.pdfIn PDF document text
    • http://trendmobile.ru/72544545107dwivu.pdfIn PDF document text
    • https://cdn.sqhk.co/jefulajidi/ifzieja/68169397661.pdfIn PDF document text
    • https://cdn.sqhk.co/feduvefas/jdzjaQG/racing_underground_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/punipopi/hAkiiY9/samsung_alpha_pro_release_date.pdfIn PDF document text
    • https://cdn.sqhk.co/turaxulefa/je9Iyje/trickshot_deathrun_code.pdfIn PDF document text
    • https://cdn.sqhk.co/gegenosuzun/EFMihjj/90497428738.pdfIn PDF document text
    • https://cdn.sqhk.co/genamudazunu/hbhh8au/occupational_therapist_definition.pdfIn PDF document text
    • http://arendaavto.taxi/hebrides_overture_sheet_music89hyl.pdfIn PDF document text
    • http://alexandreablog.com/lafepezavosepenowagufov1ts02.pdfIn PDF document text
    • https://cdn.sqhk.co/zidenesek/cgege9C/e_pluribus_unum_coin_value_1898.pdfIn PDF document text
    • http://zzzmmmmejjj.space/apc_smart-_ups_rt_1000va_230v_datasheetjjypm.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c5d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5D7 5544 bytes
SHA-256: d1c17a429adf1c0e6727ccca12e80a0e531fdb5a0300f0451c90534c721b2d1b
font_01_sfnt_off0000d889.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD889 10296 bytes
SHA-256: affe3febffdd40f1fa2fa2686ea9e39fb493a155b26a851377be11ae860374e6