Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9b391a51ca49747…

MALICIOUS

PDF

47.6 KB Created: 2020-11-07 21:43:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-15
MD5: cfcf137e6c4031711fcf680841445a02 SHA-1: 1a24aea1dda807526818465a8d3bc826b6459e1b SHA-256: f9b391a51ca4974733304ed8067743d3f68fee48f14f59516b84735cb33e0b8e
76 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/aws?keyword=sims+mobile+apk+mod PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367646/normal_5f89c084cf252.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369643/normal_5f894e69dd785.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370059/normal_5f9e05064f500.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369152/normal_5f9bcc3b100ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369168/normal_5f9a4d7781b13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383304/normal_5f8df4e7b7ef9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365660/normal_5f870444d13b5.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
    • https://uploads.strikinglycdn.com/files/04a0c4d3-dd68-4184-902b-acaa6eefef05/zanejuxamekanosoxif.pdfIn PDF document text
    • https://fazojikimugu656942302.files.wordpress.com/2020/11/sea_of_thieves_theme_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/faffc49b-7c7b-46e2-831e-5b16f00ffbd9/40724729121.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18406fc8-91bd-4fdc-8f2c-99c6ad1c28d2/butadoviruwu.pdfIn PDF document text
    • https://sejopaguvit.files.wordpress.com/2020/11/exercice_cod_coi_cos_5eme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2b31c2a-23bc-4b57-946a-27a6f1c3c2ea/funny_ways_to_say_i_love_you.pdfIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/49163808804.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f40878cf-53f8-4f09-8a51-dde71489fb12/47672357414.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_off00006c4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C4C 4920 bytes
SHA-256: c203d30c122faf0f33099e5a35bd9da9b9a642961c3155ad19a029be349e7a28
font_01_sfnt_off00007cf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CF5 11852 bytes
SHA-256: b0c4a0e4ea338d8a586b138f9e77b25eb50de960c6ad1fba19b2a0b0ecd7251a
font_02_sfnt_off0000a3b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA3B8 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361