Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcc50ce65bddd39c…

MALICIOUS

PDF

47.1 KB Created: 2020-11-06 06:46:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 9c7921caa8a184c676b1361c90eb9392 SHA-1: c5023d57c21f6e7f40895ff55006974a103697d5 SHA-256: bcc50ce65bddd39cb2be09175ff2ea1700d97157ce19a1b54584673b1daa876f
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/aws?keyword=warlock+spell+slots+explained+5e In PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/2d2b07cd700b241.pdfIn PDF document text
    • https://puzesijokivokef.weebly.com/uploads/1/3/4/3/134312217/kesodataxovu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369901/normal_5f8ac530ec8e1.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/kijelopazekune/august_grove_furniture_company.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/cherokee_community_school_district_iowa.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/brahma_muhurta.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/soroti.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/abaqus_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/berserk_official_guidebook.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/tepunogejabidisivelej.pdfIn PDF document text
    • https://s3.amazonaws.com/sikuva/angular_7_tutorial.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_off00007ad6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AD6 5336 bytes
SHA-256: a4ca17cd4309fa6c6f777c58d36c8d70a87ae7d0bcb43a1605f9c6a156c80e13
font_01_sfnt_off00008d1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D1D 10036 bytes
SHA-256: 462d9f0004ac3d0c992a43f842a81c8aa82db4eb9b8904f219734f5d05f51fbd