Malicious PDF — malware analysis report

Static analysis result for SHA-256 13edcd5fd077335d…

MALICIOUS

PDF

41.9 KB Created: 2020-10-14 21:50:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 39778aba3f94db89b4cbf2be6895ab90 SHA-1: f95ed187d2b43598cd44b2232978cbe52a23a54c SHA-256: 13edcd5fd077335d27eea14356f32862a6d53dba7064c4ed8acd243a1c02a6f9
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=crossword+puzzle+tagalog+worksheets In PDF document text
    • https://vuzevarezevarot.weebly.com/uploads/1/3/0/7/130740461/8108700.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/xelikanotuzifaja.pdfIn PDF document text
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/tuberokaxe.pdfIn PDF document text
    • https://riwisasivituw.weebly.com/uploads/1/3/1/0/131070703/zokovidazidite_tojelegilasut_sexitorizazifoj.pdfIn PDF document text
    • https://besiwalufeg.weebly.com/uploads/1/3/2/6/132696214/5b300b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367013/normal_5f8741995e49f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365598/normal_5f86fb05d101d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366377/normal_5f874698b67cb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366957/normal_5f87399acd6eb.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/01e848bb-4695-48fd-b46c-24a30d3de2b4/musenorazamuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75193ec8-ccda-48fa-9e3f-8abaa79e65a3/potogiduwo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05fee808-d5c5-4026-b4d1-637e5ea96f64/56025561103.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebe866cb-79c6-4094-8e16-447c0c61eda2/nolosuxipivodow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8609/4242/files/recibo_en_ingles_sinonimos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/8382/8900/files/27687076795.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/3823/0696/files/martini_henry_rifle.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/4304/8602/files/regimijopeximibe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/0693/4178/files/mtg_arena_pro_tips.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2715/2539/files/tukipefixobak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0557/7896/files/89230992403.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8096/1186/files/hidden_valley_market_oregon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5027/7791/files/14386156567.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/7865/7212/files/28868920323.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_off000065cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65CF 5332 bytes
SHA-256: 34b8577b3b27d835832a60d4ead7132cc0923381f3ca8c165a2340e5ff18a7cc
font_01_sfnt_off00007801.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7801 10064 bytes
SHA-256: 25b0b2b3a5897e62bfe6ffd11cb089f46cc769e0277193705c88aac8f498a513

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