Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d999c8af6f05b9e…

MALICIOUS

PDF

77.3 KB Created: 2020-10-30 09:49:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 80577b5b1205dcd3154f947a2d815914 SHA-1: 252fbc818db966c3d6f1bb3900df868eabd93b1f SHA-256: 8d999c8af6f05b9e2ef797291d06f559552a867c0c902c3f018c444d3ede595d
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that redirect to known malicious infrastructure, specifically a redirector designed for SEO spam and phishing. The document body, though partially corrupted, contains text related to game items and a URL that is also flagged as malicious. This suggests the document is part of a phishing campaign aiming to trick users into visiting a malicious site.

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/aws?keyword=legacy+of+the+dragonborn+quest+items In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379377/normal_5f96e8f90bb49.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/sixukejomiwewanage.pdfIn PDF document text
    • https://derefejoj.weebly.com/uploads/1/3/4/3/134358497/5a3d9fea5.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/1dcdefef-e45f-424b-851f-1ff79056798b/vexinobok.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/munojopamigudixebuvafa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/356f476a-c921-4f37-870b-b07531a0bad9/31973653020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e6d5dcc-e40a-44e6-a161-f9acbac3d05f/81461610422.pdfIn PDF document text
    • https://s3.amazonaws.com/wejalixex/95793304880.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/gta_vice_city_all_cheat_codes_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/19382244100.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/my_phonics_grade_1_activity_book.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/wafoxoxu.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/65355848619.pdfIn PDF document text
    • https://s3.amazonaws.com/jaburirarov/lomibawu.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE3 5712 bytes
SHA-256: a3c4048b922910fe2ce8ebebe72dff73459873b8e4dd78882a11adf24a8544f7
font_01_sfnt_off0001032d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1032D 10988 bytes
SHA-256: d9babe26ad11b8d7e96751d276ac320a6337c7972d1bad62b485a1ce546aa9e6

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