Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd5e66bea80b5c63…

MALICIOUS

PDF

53.6 KB Created: 2020-10-16 01:44:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: c81ebd97e4118dd55cb561d7d34695f2 SHA-1: e39418b3ecf1a8f2d6b4c52eee81adb35bcfad57 SHA-256: bd5e66bea80b5c6341e41a5bb6655d7474e0b700e33bc46870e995f19eb63036
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://ttraff.club/pify?keyword=pokemon+go+apk+for+android+4.4 In PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/09b03b.pdfIn PDF document text
    • https://buliduxefexefux.weebly.com/uploads/1/3/1/6/131636978/zuberojo.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/e5bcd2697.pdfIn PDF document text
    • https://wuvirinofibugiz.weebly.com/uploads/1/3/1/0/131070402/nugaratidabeduviz.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/rugatu-rugot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9085/4566/files/wujuvezukisexapovef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/0218/2809/files/honeywell_pro_series_thermostat_manual_wifi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5304/0295/files/quadratic_function_transformations_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/9470/2763/files/46948698060.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0156/3301/files/stick_and_rudder.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/3366/1077/files/waplog_match_apk_vip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4373/4182/files/que_moviles_con_android.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/1631/3768/files/1953_studebaker_commander_for_sale.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3966/0954/files/adjectives_that_start_with_p_that_describe_a_person.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2480/8096/files/83202898813.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1079/3382/files/3483680442.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/7213/1750/files/dojimugonolizakigubaso.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0477/8773/7255/files/ps4_game_destiny_the_taken_king.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/3241/8725/files/galepudibenabivifubufo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0493/7429/8271/files/71952200422.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/8300/1756/files/drag_bikes_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/897e3601-5404-4e93-8161-9cc17d2cfd00/fopofoboforobigabobilom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d84472ce-8d45-4b01-a008-fced3133e31e/25496376871.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62827ade-63cc-4def-a055-2f7c5d9df3e4/ligugirewawifi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eef8264a-aa04-4c89-9241-d209af56ce90/tosakuzoxiz.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_off00009163.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9163 5336 bytes
SHA-256: c8933e1588fc22c88673c06f805d754f34d1bf9d0a1dbd01271c375136106a45
font_01_sfnt_off0000a37d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA37D 10908 bytes
SHA-256: 0782da7767a4c934209d7120cd7c7730f95d1255d2d5818eb31c48966330d73f