Malicious PDF — malware analysis report

Static analysis result for SHA-256 9af4fbe5b52a7d5e…

MALICIOUS

PDF

47.6 KB Created: 2020-10-05 09:41:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: aaa8b1d9a077b85823684a69a3bfb671 SHA-1: bddd7b60abd40ba8a1453d1aae56778e56241ba7 SHA-256: 9af4fbe5b52a7d5ec91055643b00f6f90fa96f3875c5adffae62fb30ac476caa
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://cctraff.ru/strik?keyword=hack+simcity+buildit+download+android In PDF document text
    • https://site-1043128.mozfiles.com/files/1043128/92602390538.pdfIn PDF document text
    • https://site-1038967.mozfiles.com/files/1038967/265794729.pdfIn PDF document text
    • https://site-1039328.mozfiles.com/files/1039328/71272711281.pdfIn PDF document text
    • https://site-1036946.mozfiles.com/files/1036946/kazegatorotoruguzu.pdfIn PDF document text
    • https://site-1037003.mozfiles.com/files/1037003/kexewosaguninunoros.pdfIn PDF document text
    • https://site-1038471.mozfiles.com/files/1038471/10817120318.pdfIn PDF document text
    • https://site-1038849.mozfiles.com/files/1038849/xejovep.pdfIn PDF document text
    • http://zuxumomup.diplomainprofessionalstudies.com/uploads/1/3/2/6/132680981/zoleve.pdfIn PDF document text
    • http://files.coloradomomentum.org/uploads/1/3/0/7/130738801/bonurofuduw-fiwafafala-tidurokavilove.pdfIn PDF document text
    • http://waravej.mindset-hypno.com/uploads/1/3/0/7/130775085/jelex_subigugexetoga.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/1/0440/7384/4888/files/pathfinder_2e_weapon_proficiency.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2172/9955/files/60288627273.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/9935/1965/files/afk_arena_hack_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3265/8588/files/usage_agreement_photography.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2100/8548/files/18731371110.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_off000065c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65C6 3036 bytes
SHA-256: 1b496f88d5e1564163a59148779c825218b4d16a90caf11e427505a151cdc4de
font_01_sfnt_off00007099.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7099 5444 bytes
SHA-256: 0ec89a55937a8ab97078f136a1caaf7e985118a71f6811abd7799b3dcfa87ee1
font_02_sfnt_off0000831b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x831B 14360 bytes
SHA-256: c74f0f3fef13e9196ebb09bfa323adea69cc0a83d37aa89a065fd2e4c6fdc107

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