Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d15bbc4a3ee9264…

MALICIOUS

PDF

51.4 KB Created: 2020-10-21 12:58:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-25
MD5: 3f7b15f736531ac50201f490df89aff2 SHA-1: af08f8e3534e62f91f2c47d0bc7ceeffae478107 SHA-256: 8d15bbc4a3ee9264c628fc8765f79cb4c33d78b5bfcdb410bdde299ea6b7a353
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://gettraff.ru/123?keyword=basic+engineering+drawing+textbook+pdf In PDF document text
    • https://miremewokar.weebly.com/uploads/1/3/0/7/130738658/fuwadujer.pdfIn PDF document text
    • https://xubuvene.weebly.com/uploads/1/3/1/3/131380433/fiwoligerepab.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/ramugimexixepaba.pdfIn PDF document text
    • https://laxuruvu.weebly.com/uploads/1/3/1/4/131482832/xawokogodeduxugowudi.pdfIn PDF document text
    • https://zeteparikimifol.weebly.com/uploads/1/3/1/6/131637109/rilekoponajogewinix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369783/normal_5f8bf1090949e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383699/normal_5f8fb49c01efa.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/gadizalisu-komikukola-dozopunemufag.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/3cb113af6.pdfIn PDF document text
    • https://jikolugoxolij.weebly.com/uploads/1/3/1/3/131379047/e21b1f06.pdfIn PDF document text
    • https://jarapitoxedomel.weebly.com/uploads/1/3/1/4/131437170/gafasadigujudu_fiwodedare.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zirojopemup/11294194918.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/32349715986.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/delodosidufavogepirijar.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/vizibelov.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/important_days_in_all_months_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/98596062166.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/20540891615.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/11599298413.pdfIn PDF document text
    • https://s3.amazonaws.com/gupuso/dulitugerowurojamogova.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/gidubov.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/spanish_to_english_worksheets_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/dawiwetuwuzuwa.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_off00007210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7210 5704 bytes
SHA-256: 212c37c1d6df4576876cfa54db343e84863a309ac439f363e3c639bc69264890
font_01_sfnt_off00008594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8594 2116 bytes
SHA-256: 49f1c345582212729590e0456707ca92d3838aef8cba26fbcaa28f8c5b0a0640
font_02_sfnt_off00008f5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F5F 14992 bytes
SHA-256: 14f4427c0ab22b9b9c4af8904e0c326edfe48482957b9f9df60dcd84569d857b

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