Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e32d158abae1612…

MALICIOUS

PDF

41.2 KB Created: 2020-10-03 12:44:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 15ce6aaae24a86a3b2398894d078fd4a SHA-1: 297eecfc06c1b6b1f8d8ad5c5faf12baca812e9f SHA-256: 1e32d158abae1612619badfa0e52ca74dc39e8faf6eece91d9965aed58386f31
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/strik?keyword=introductory+microscope+lab+activity+answer+key In PDF document text
    • https://site-1038750.mozfiles.com/files/1038750/gopis.pdfIn PDF document text
    • https://site-1037054.mozfiles.com/files/1037054/83805466897.pdfIn PDF document text
    • https://site-1039167.mozfiles.com/files/1039167/58363575580.pdfIn PDF document text
    • https://site-1038495.mozfiles.com/files/1038495/79832336897.pdfIn PDF document text
    • https://site-1038938.mozfiles.com/files/1038938/pumaxojibe.pdfIn PDF document text
    • https://site-1038378.mozfiles.com/files/1038378/nojififezigej.pdfIn PDF document text
    • http://files.jimcohenjudaica.com/uploads/1/3/1/4/131453946/348044d828fd.pdfIn PDF document text
    • http://files.dbsa-glbt-chicago.org/uploads/1/3/2/6/132682171/davidajuvibarasu.pdfIn PDF document text
    • http://joburol.mimifdn.org/uploads/1/3/1/3/131383652/18e5aae6fb5.pdfIn PDF document text
    • http://xonamapoj.josiahsoils.com/uploads/1/3/1/1/131164406/b3c0acc6a8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off00006238.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6238 5612 bytes
SHA-256: aa686cc153ae8a9b3bad6a52db81c0dd641cfff5c216bbd1ac7191917a10729d
font_01_sfnt_off0000754d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x754D 10112 bytes
SHA-256: 2a1a312c7cfb9c3ffefc1cdf505dc09170fc8f56cc396462976615ca7d3c80ad