Malicious PDF — malware analysis report

Static analysis result for SHA-256 cabd559f6c41b670…

MALICIOUS

PDF

48.1 KB Created: 2020-10-05 07:05:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 46897c8e62b18b85671906c41754c261 SHA-1: ec46027421c17d84da79690f8c23dd9ffca6f950 SHA-256: cabd559f6c41b670d1ff594cee405d8bb99e164d80f11ff57bd5e70b112b93c0
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one specifically identified as a malicious redirector. The ML classifier strongly flagged this PDF as malicious, and heuristics indicate it functions as a link farm hosted on disposable infrastructure. The embedded content, though heavily obfuscated, includes URLs pointing to potentially malicious or spam-related content, suggesting a phishing or malware distribution attempt.

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://cctraff.ru/strik?keyword=benny+hinn+good+morning+holy+spirit In PDF document text
    • https://site-1039602.mozfiles.com/files/1039602/80298722033.pdfIn PDF document text
    • https://site-1036910.mozfiles.com/files/1036910/86947459213.pdfIn PDF document text
    • https://site-1036993.mozfiles.com/files/1036993/38008096734.pdfIn PDF document text
    • https://site-1040005.mozfiles.com/files/1040005/depumav.pdfIn PDF document text
    • http://files.haynesbserv.com/uploads/1/3/1/3/131398140/7d7c0f0a9947ccc.pdfIn PDF document text
    • http://gozef.aayogaandwellness.com/uploads/1/3/1/4/131454215/f86768f5ace2.pdfIn PDF document text
    • http://kufivupek.karoogravelgrinder.com/uploads/1/3/0/7/130738696/buduvixisen.pdfIn PDF document text
    • https://site-1037138.mozfiles.com/files/1037138/xesupopipobifunakedimi.pdfIn PDF document text
    • https://site-1037129.mozfiles.com/files/1037129/galegisetewuduxefa.pdfIn PDF document text
    • https://site-1036997.mozfiles.com/files/1036997/xunisemumumi.pdfIn PDF document text
    • https://site-1039899.mozfiles.com/files/1039899/buwitugijawuje.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/ba680953-e2bc-4a34-9b21-0b410c9c6b7f/zasira.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acc8ea4b-003d-4f6c-abd0-261bc3bd2239/85367106725.pdfIn PDF document text
    • http://files.hgreen.people.ua.edu/uploads/1/3/1/8/131856068/midaz.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_off00007e1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E1D 5312 bytes
SHA-256: 2477a8d98e8c9f3e1c387ab82a11fbf272d35ea607c5dba5e6983c2c2a4c59ae
font_01_sfnt_off00009014.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9014 10424 bytes
SHA-256: 529ec164ba019c920ebe4c95180f7e341edba93a49987c6f7f4a44403fba53b6

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