Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c4418759058ea98…

MALICIOUS

PDF

51.1 KB Created: 2020-10-04 23:45:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: e43d5d946afa2b96f4e74b67e8775fca SHA-1: 925f6caf0529778b0b22dc104696706bf5ed0c2b SHA-256: 8c4418759058ea98a162637b17559d332e0efadc890c6b68c508104e27f76820
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://gettraff.ru/strik?keyword=alan+walker+the+spectre+mp3+download In PDF document text
    • http://mevanej.circlecamps.org/uploads/1/3/0/7/130776454/visojiwugepok_kesodetudogoz_kilisula.pdfIn PDF document text
    • https://site-1040131.mozfiles.com/files/1040131/minovedeba.pdfIn PDF document text
    • https://site-1036698.mozfiles.com/files/1036698/75613730003.pdfIn PDF document text
    • https://site-1038349.mozfiles.com/files/1038349/pegafarodotekej.pdfIn PDF document text
    • https://site-1036699.mozfiles.com/files/1036699/85417347571.pdfIn PDF document text
    • https://site-1040438.mozfiles.com/files/1040438/ketur.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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/5860f79e-357c-4167-98cb-77b576f6e1f9/tuwijapenadebazuvune.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b399597-b3e9-4042-a7be-c5aaf1016244/gasulajixewipo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73af346a-e687-48dd-ad94-fccd18d90691/gisatumug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c0b0808-84b8-4a00-8829-65fc05441b19/94379168778.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8db8a48-ac62-4c76-8ab4-814b1caac7aa/mawimogadefo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d4b3eb9-8fd2-402a-91e0-234b84041f80/6725101867.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71198712-9522-44ea-bd3c-61909a300b9a/fizugudili.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba7a1e71-8bc4-438a-b838-49d388e712bd/danofulimazozadizazakomem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cdc3959-8344-4127-bb39-39628b178e12/72143505639.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004e9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E9E 3036 bytes
SHA-256: aa5372358103b7cc4ef908374b598f052ee1396b52dcf70fa50afca2ab89f292
font_01_sfnt_off00005bb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BB0 5624 bytes
SHA-256: b005334ae32723cb8541d02daae22f3bf0bd6f0d7fc0f9f175f089d8198f7d7b
font_02_sfnt_off00006eaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EAF 2724 bytes
SHA-256: 61f95ce0fe8f0b71e5b10d1b09b8309c7cff05bf2b517bb2fccecbbad37d94ac
font_03_sfnt_off00007a5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A5D 10544 bytes
SHA-256: 4d13c5fc4e0e79d4b8458984e5852f3da584890a944e87732d88871957901304
font_04_sfnt_off00009eb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9EB7 18776 bytes
SHA-256: feb8abefc7511ddfab92c1296703e147890a0295e2fb8f1c0103b82b6716c704

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