Malicious PDF — malware analysis report

Static analysis result for SHA-256 4501d5e8a4b76bf9…

MALICIOUS

PDF

46.5 KB Created: 2020-11-07 11:14:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: 8ad727251ffeea49702cef45c1022c17 SHA-1: 9d3f739838e0a1cc097e9f61c76e84051520c9c1 SHA-256: 4501d5e8a4b76bf90b3264734155bc02d322b3c0cc6e8f8f1f954dc22b394cfd
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • 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/123?keyword=the+five+languages+of+apology+pdf PDF link annotation
    • https://duwobimisenuzo.weebly.com/uploads/1/3/4/6/134615726/3172507.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387703/normal_5f8f6cf5b3618.pdfIn PDF document text
    • https://jawasolasazilem.weebly.com/uploads/1/3/1/3/131379174/zidebesirolabavo.pdfIn PDF document text
    • https://kodowogokilikid.weebly.com/uploads/1/3/4/4/134466607/sawuwi.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://s3.amazonaws.com/memul/63184134744.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/pizza_hut_song_youtube.pdfIn PDF document text
    • https://s3.amazonaws.com/jijumupade/paritujunemekufiziwezika.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/bedtime_stories_for_toddlers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7efbb9b2-a29e-470b-ad71-129334f28523/rbi_exchange_rates_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/15374107539.pdfIn PDF document text
    • https://s3.amazonaws.com/zidosozawok/stihl_bg55_blower_repair_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/sales_management_analysis_and_decision_making.pdfIn PDF document text
    • https://s3.amazonaws.com/kibavutibeved/hitachi_cordless_drill_parts.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_off0000692b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x692B 5120 bytes
SHA-256: f9c9560e583ecf990fc1d9a0292b796543a8416120796b7a7c3bc75be5e8e5f4
font_01_sfnt_off00007a9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A9C 10664 bytes
SHA-256: 9d00662aa25a2393867cc0b41c689f201d39c50c7093f6eb29caf94d5c58e8fa
font_02_sfnt_off00009ebb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9EBB 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c