Malicious PDF — malware analysis report

Static analysis result for SHA-256 88f7e2b98e5e020c…

MALICIOUS

PDF

47.7 KB Created: 2020-11-06 03:18:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: d77782ac2f421e6e5638325930878178 SHA-1: 4ab2b0081a3eb1cf809aa08c06555d31899869f1 SHA-256: 88f7e2b98e5e020ca2e005ae2f5200479f914b3b24c5f05c90de6378758b5ba8
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://traffking.ru/123?keyword=the+sound+of+night+poem In PDF document text
    • https://cdn-cms.f-static.net/uploads/4462985/normal_5fa448f3de8d3.pdfIn PDF document text
    • https://kilunifogewawo.weebly.com/uploads/1/3/4/4/134457757/lodebukuraz-lunubazixozal-jovejeforu-ganome.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/salosibejodod/keburusumu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91c24771-5024-4690-bf28-b5ba89b1f44b/32870043369.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/4572/1509/files/last_of_the_mohicans_imdb_parents_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/watajive/11284234178.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/horde_leveling_guide_classic.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/gen_2_camaro_ls_swap_kit.pdfIn PDF document text
    • https://s3.amazonaws.com/mufukep/vsam1040_ca_phe_sang.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4dbeadb2-edd3-459e-a2c2-449c8c63f17d/23018347832.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56c62a6c-11f0-40a4-b598-dfab49227b88/ppsspp_gold_apk_download_latest_version_2020.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_off00007dcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DCD 5064 bytes
SHA-256: c5afc75cd5ae380429d6e85fb17dca54a09e59fe355d0fc16938f438b45b0017
font_01_sfnt_off00008ef1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EF1 10292 bytes
SHA-256: 6154272168689782ef0d68d431f35e34131c04f6c1a748f0ccf182d6322f2bfc