Malicious PDF — malware analysis report

Static analysis result for SHA-256 461f21f99b46b412…

MALICIOUS

PDF

44.8 KB Created: 2020-09-30 14:25:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: e0873ff0e58c6b7d1be5b989052382d9 SHA-1: 69334b8efb5a9d68248ebeb3eb0fea38b0606e76 SHA-256: 461f21f99b46b412ba8e2826dc9c8ce47afb268a513d2357cc9e95be757aa862
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://cctraff.ru/strik?keyword=maya+bifrost+tutorial+pdf In PDF document text
    • http://fusukako.mcnamaragypsies.com/uploads/1/3/1/4/131438500/f1410b439a3.pdfIn PDF document text
    • http://files.lynnobrienmusic.com/uploads/1/3/0/7/130740082/rerefo_dumitenif_kusosopujorexul_fomozijud.pdfIn PDF document text
    • http://files.dvaughnpershing.com/uploads/1/3/2/8/132814166/8ea61b2a.pdfIn PDF document text
    • http://files.rogartscouncil.org/uploads/1/3/0/7/130739646/c9df8.pdfIn PDF document text
    • http://nisini.kelsey-harrison.com/uploads/1/3/2/7/132740564/ladizim_veganez_lonored_zogod.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/3316c3d9-e66e-4a6e-95d2-7b284de87b42/65123489305.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64e856c9-2eff-4f6b-9791-864e6e706022/rinoxumobalipefaj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e545e62b-40a1-4527-a15f-82544454930b/wesuxolix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb8483a0-bdf2-4d06-966c-719735f7732f/tiniwifap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f562e482-9eb7-45cb-8e75-b7e88560ea89/pefugukaveze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9812/8036/files/77628441236.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9054/2743/files/49303008699.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2058/2050/files/wujude.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0459/5256/5407/files/tilabofipa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6440/1818/files/26681164109.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_off000068bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68BB 5280 bytes
SHA-256: 6302dda6618c39ac1a9d958906e6ed2d496eccfaf93eedea100026e08f00d336
font_01_sfnt_off00007ac9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AC9 2100 bytes
SHA-256: aae0df243f2bdeffb1d8440c7abb29e8a08413294f9c34608e08d3e2f92c1d57
font_02_sfnt_off000083e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83E2 9968 bytes
SHA-256: 82d26ad24aee92012fdd4f8cd59286f5c704fd781720a61a779c33cc0e779c95

Open this report in the interactive analyzer, or submit your own file for analysis.