Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bec6dc311fd5b7e…

MALICIOUS

PDF

41.8 KB Created: 2020-10-14 19:48:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: a1c47fae51ba843d6b11ed35c36195c8 SHA-1: 08526cb57e9b107c6b7162620d39b7f551de080b SHA-256: 5bec6dc311fd5b7edbc44ab343d413149942ffdcf5d297a288648aea811fad01
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gettraff.ru/pify?keyword=delete+downloaded+files+on+android In PDF document text
    • https://site-1036632.mozfiles.com/files/1036632/48933923688.pdfIn PDF document text
    • https://site-1043876.mozfiles.com/files/1043876/zetoja.pdfIn PDF document text
    • https://site-1040041.mozfiles.com/files/1040041/92290154602.pdfIn PDF document text
    • https://site-1043664.mozfiles.com/files/1043664/kesurudigum.pdfIn PDF document text
    • https://site-1039361.mozfiles.com/files/1039361/pibakepinemezoxav.pdfIn PDF document text
    • https://site-1043158.mozfiles.com/files/1043158/mituk.pdfIn PDF document text
    • https://site-1043885.mozfiles.com/files/1043885/66828490346.pdfIn PDF document text
    • https://site-1037172.mozfiles.com/files/1037172/4264282149.pdfIn PDF document text
    • https://site-1041608.mozfiles.com/files/1041608/45643784533.pdfIn PDF document text
    • https://site-1040685.mozfiles.com/files/1040685/pikok.pdfIn PDF document text
    • https://site-1039570.mozfiles.com/files/1039570/63506326773.pdfIn PDF document text
    • https://site-1036920.mozfiles.com/files/1036920/75292444868.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366335/normal_5f8716d9737ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365626/normal_5f86fea543283.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366043/normal_5f8722a4d9404.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365540/normal_5f8711e8c193d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365546/normal_5f8712f1274b0.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/1/0496/1841/9876/files/30902217068.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7650/9080/files/wugin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/6629/6986/files/recording_screen_video_on_android.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_off0000664a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x664A 4992 bytes
SHA-256: 41d378d8758f9b242e431a7ca4030ed2e895dc9ac2e8669b3e7b987e6327fff9
font_01_sfnt_off00007767.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7767 10192 bytes
SHA-256: 2b622b7ce3fbf2d6e090bd257e5b83827078fce869630492c13db4a10165ca9d

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