Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf9c64f30a1333a1…

MALICIOUS

PDF

39.0 KB Created: 2020-10-04 17:05:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: d5f902599bd9d79f284807fb8d49b490 SHA-1: 5d5fa8cbcd2d407153700ec791397530963f7d81 SHA-256: bf9c64f30a1333a1f9f48ab14781c952baa040e3be65456f0cfc8b447a3ce203
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/strik?keyword=brand+new+key+piano+sheet+music+pdf In PDF document text
    • https://site-1040238.mozfiles.com/files/1040238/pubobiluvokuwazezirivote.pdfIn PDF document text
    • http://files.theandersonoutlook.com/uploads/1/3/1/4/131455463/ce0167914.pdfIn PDF document text
    • http://files.moralish.com/uploads/1/3/1/4/131453950/2654052.pdfIn PDF document text
    • http://rilaw.deeperlifehuntsville.org/uploads/1/3/2/3/132302944/bexupewidisisal.pdfIn PDF document text
    • http://files.soldhomeorganizers.com/uploads/1/3/1/3/131383602/pudezufodijototam.pdfIn PDF document text
    • http://pufare.wall-in.com/uploads/1/3/2/6/132696067/guwidotajagipigadi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0399/2485/files/mahoning_county_auditors.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8547/1656/files/scientific_name_of_vegetables_only.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/2226/4738/files/risd_liberal_arts_office.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0238/2504/files/jokagonikamabafu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2784/7576/files/pokemon_mystery_dungeon_blue_rescue_team_recruitment_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/7024/1953/files/sagamugorejas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/2624/0920/files/pasorufidamupabu.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_off00005a6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A6F 5672 bytes
SHA-256: 4e01037ad3ab9b2a500fa570cf31ef6c24e09588484adc41e69cc2b23c712b03
font_01_sfnt_off00006dae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DAE 9844 bytes
SHA-256: bd4a101197acedefaae48241c72c26b32786d463ecaafe715becd3cb8b4d77eb