Malicious PDF — malware analysis report

Static analysis result for SHA-256 95f80a582434559d…

MALICIOUS

PDF

42.7 KB Created: 2020-10-02 11:20:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: b50bb0fb5274d056655e6850a7cfa5d4 SHA-1: 5c3bf0721d07c4d2ce1879dc4b71ddfb3222f52f SHA-256: 95f80a582434559de600214379707a35be5cf87803cf0c292a2ae958fd22e9e1
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/strik?keyword=console+script+prodigy+hack+level In PDF document text
    • http://files.acaccentsjewelry.com/uploads/1/3/2/6/132680867/ce5e4250e1565a.pdfIn PDF document text
    • http://files.eteeria.com/uploads/1/3/1/3/131382786/a7b743802.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/efc692bf-1781-40ac-b0c7-2681fb0500d2/milepekexalosogexitofopu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6fd11c0b-722e-410c-95c4-eb84f69fd4af/kofugemawisunositonu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dc2b3e4-58dd-494e-9812-7a1a323ec0b2/daligidekerixotomolit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85528811-e4b7-44b1-888b-e183adc9d885/jawatez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89fec3cb-0a01-4cbb-af72-2eae21d83097/57491681586.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08a67888-7229-40e6-93aa-a64e59168088/zawazebaper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fb094df-f4bd-492d-aa1f-bb74b214a879/74636769282.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7852/4832/files/national_floors_direct_vs_empire.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/3965/6602/files/pathfinder_kingmaker_gozreh_cleric.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6195/9073/files/modern_combat_4_1.1_0_apk_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/7000/0804/files/13166891361.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8948/4190/files/el_espiritu_santo_en_el_antiguo_testamento_citas_biblicas.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_off0000682b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x682B 5464 bytes
SHA-256: d1efcc6d068c4a3effe30ea39f6b9914e213c446765e510e3529acf0245270c4
font_01_sfnt_off00007ac3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AC3 10192 bytes
SHA-256: 5b8534074667e539ddc3dd5b5ee9337588cb001f4d68521ca49a845769b8f8ed

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