Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8b181a9c19c6c01…

MALICIOUS

PDF

45.7 KB Created: 2020-11-02 12:07:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 8dcbd1be361fc0b5136847efee244f04 SHA-1: 9cba3d2d48aad8582d7624f40fdf2e7081bb2c9d SHA-256: e8b181a9c19c6c01cd09c7f1a6e5f845750acba24be46fa53cd4f58def4eb29a
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://gettraff.ru/123?keyword=fisher+snow+plow+manual In PDF document text
    • https://muzokive.weebly.com/uploads/1/3/4/4/134498707/muris_zowiradi_pugevapa_zajolotimu.pdfIn PDF document text
    • https://jonowukamox.weebly.com/uploads/1/3/4/3/134372820/c88762e8f958f11.pdfIn PDF document text
    • https://kufazijofiw.weebly.com/uploads/1/3/0/7/130776126/subisifegutilax-xidozope-loxejagunoxexil-denajo.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/1/0497/8114/5762/files/roteselisitog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15dc8f08-5536-49d9-b009-2b2781600cb2/83043350337.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/2078/3263/files/the_redbook_of_fruit_jars_by_doug_leybourne.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/9770/0549/files/gijaxarezagojufutolitokav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e43ed11-48cf-4eed-8bdb-671a956d28a5/lewuwunizarikebufiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf554d67-9fd1-4a76-92e9-842733178e67/nier_automata_amusement_park_lyrics.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/jutifarevorumugagodujapuk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0505/6587/3849/files/zoxudalafow.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_off000074cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74CD 5108 bytes
SHA-256: 0b7ea3ecc1f5dec7f2cedaa7aedc06ffab4d8b68ef1f4611ee248cb7ee47b361
font_01_sfnt_off00008611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8611 10632 bytes
SHA-256: f5e3a84d6d02732ea25825d0d1bf12b246677f3006c81fb31609c947cb56f832