Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd1055f9d05e1aff…

MALICIOUS

PDF

56.7 KB Created: 2020-11-07 05:50:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: ca5575d6946d3fd4b362a31cfed2b587 SHA-1: 3d30e604b0a1cdf11f6d905d4b913b52bef75e88 SHA-256: bd1055f9d05e1affc69dda50b021cb13a427564812831f457a9786feb9f1b88b
234 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/123?keyword=cisco+ip+7945+manual+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366364/normal_5f88e1813ec4e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451220/normal_5f9f40c120bcf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408976/normal_5fa200f84eada.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/9deb26f9-7c25-4a21-814b-a7521c807013/xuwisedaki.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/mapaxoxefevaxamesevizufi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed60f528-c8f7-4138-b48b-bc1d7df25c9b/91442729681.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/561e501c-3e02-4769-9449-23f0b88a6d6e/92893785052.pdfIn PDF document text
    • https://dipadek.files.wordpress.com/2020/11/javascript_and_jquery_interactive_front-end_web_development_by_jon_duckett.pdfIn PDF document text
    • https://xasuxedizos.files.wordpress.com/2020/11/gemunukivejojurisaleva.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/full_cast_of_the_born_losers.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/chordate_zoology_by_ps_verma.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcfc9f5c-05b6-4c37-9b0c-28f15a15c311/45152340120.pdfIn PDF document text
    • https://dowuwiridewe.files.wordpress.com/2020/11/sugoboralijub.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_off00009fdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9FDB 5556 bytes
SHA-256: ef32b4bed114ec86bf83d1373eec4422fe1316f86997f6ab57ec7ddc925db488
font_01_sfnt_off0000b2c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2C4 10512 bytes
SHA-256: c558b4ffd6051c47aa8627710c02bc040c521d58ff1578d613b2398d647a92d1

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