Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7c631ad8bedf7b5…

MALICIOUS

PDF

43.9 KB Created: 2020-10-01 23:09:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 1a802b3ad158476bac47f6bec1d4fdc1 SHA-1: 21766ad70d2c6d95d32089d2cd402d1999c807aa SHA-256: b7c631ad8bedf7b5ec29c9b9195ccc28fdccf9e70e798ced36f5a9506d5b0e95
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://ttraff.me/pify?keyword=dragon+ball+legends+hack+apk+1.32.0 In PDF document text
    • http://jisirubev.simplelifebrewing.com/uploads/1/3/1/4/131406289/zufawomujawu.pdfIn PDF document text
    • http://files.techedlearning.com/uploads/1/3/1/6/131606490/woxokavijenebazexap.pdfIn PDF document text
    • http://gudavoraw.hermanngardentours.com/uploads/1/3/2/6/132680955/lezaxawepa.pdfIn PDF document text
    • https://site-1039508.mozfiles.com/files/1039508/71740643205.pdfIn PDF document text
    • https://site-1039355.mozfiles.com/files/1039355/sirodetixajovitezamob.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/e65f6560-1042-4c59-9dae-2b38f0ebbed3/31864965318.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8444/5864/files/intro_to_optics_pedrotti.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0460/0650/1543/files/bassett_emerson_crib_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/8846/5051/files/south_whidbey_island_things_to_do.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_off00005f2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F2F 2952 bytes
SHA-256: d8b907802410e675ceca2784509e58a9dae2947c1b2ad43e3e0c02687eabed47
font_01_sfnt_off000069bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69BD 6060 bytes
SHA-256: a7b2425d4c2d23ba6e5651f1663224ae9a0206385a8c8d13ed0d417ba489fd3f
font_02_sfnt_off00007e5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E5D 10564 bytes
SHA-256: c9a55f806adf6299b6fe532c14b44470ffc66343eb8422488140daa0429ff274