Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ec30f8188d4625a…

MALICIOUS

PDF

47.2 KB Created: 2020-10-15 22:11:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: c8fa36d40c9537c3e0d2261db59e8769 SHA-1: 85789b8063fcc21390e71ee64869acd3a77619d2 SHA-256: 7ec30f8188d4625a1423bfb365d4d1f3e737719ec0cafa697410f2f67cd7d1c7
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://ggtraff.ru/123?keyword=monthly+payment+formula+worksheet In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365652/normal_5f873547ea600.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365567/normal_5f86f6ae2e7e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367275/normal_5f873c0584024.pdfIn PDF document text
    • https://site-1043291.mozfiles.com/files/1043291/91403989516.pdfIn PDF document text
    • https://site-1039948.mozfiles.com/files/1039948/65400696082.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/1ecc76dd-dbe6-4589-8998-8ff8be61d5c6/piwezijizumigoxosej.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd0363fa-5a10-491b-8ffa-573bb7c46a58/votarodokukavu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/791d2429-1d4f-4d0c-a4a7-5444efd4271b/3595501569.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1aba3c17-f918-4916-85e7-899ed6d32e22/molovegopita.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4060/2269/files/mandolin_wind_lyrics_and_chords.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0504/5456/0928/files/natilixisufonele.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/9207/3376/files/94621603579.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/1714/4989/files/fatigue_and_dizziness_after_tia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d734a8e7-7db0-40c8-98ba-9fb750fd22ec/nazuxikelakazinejida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95fd13a1-45d9-49a0-8a89-a5aef3d91b52/tupilapawipov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/0380/1510/files/stand_beside_her_and_guide_her_meaning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/5490/9608/files/sejiroxiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/7126/1854/files/wow_wotlk_loremaster_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7662/5583/files/xuwabifumudunarawo.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_off00006ca8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CA8 5236 bytes
SHA-256: b9faea030fae67f58da723869b2727554e737784893676bc2e1872e89c36ce08
font_01_sfnt_off00007e66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E66 10252 bytes
SHA-256: 811f480ed3d7f54a3d7e87bd21c838832f8ecb1027ca86d6674490e8e53a458f
font_02_sfnt_off0000a177.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA177 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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