Malicious PDF — malware analysis report

Static analysis result for SHA-256 d7f9597ccda61dcc…

MALICIOUS

PDF

41.6 KB Created: 2020-10-01 03:26:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 817473dbb11e18b049cd928c8d41187b SHA-1: 71e2a84695f52f5fddad203adadd0e6f5628eec7 SHA-256: d7f9597ccda61dcc27d45fb2075eb797a06224c06ac2e4ff94c059577479e321
184 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.
  • 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=internal+auditing+for+dummies+pdf In PDF document text
    • http://files.picoworm.com/uploads/1/3/1/8/131856398/5028103.pdfIn PDF document text
    • http://fevetumal.reaching-the-masses.com/uploads/1/3/2/7/132740798/mexufep_mokefok_momobo.pdfIn PDF document text
    • http://files.authoravadanielle.com/uploads/1/3/1/6/131607029/garidot.pdfIn PDF document text
    • http://pebosena.owenty.com/uploads/1/3/0/8/130873710/86795.pdfIn PDF document text
    • https://site-1036799.mozfiles.com/files/1036799/rawamozubipasejitu.pdfIn PDF document text
    • https://site-1038345.mozfiles.com/files/1038345/61791967568.pdfIn PDF document text
    • https://site-1037082.mozfiles.com/files/1037082/37372228970.pdfIn PDF document text
    • https://site-1037113.mozfiles.com/files/1037113/97109682370.pdfIn PDF document text
    • http://files.valerieconnor.com/uploads/1/3/1/4/131437676/61159668989.pdfIn PDF document text
    • http://nupikele.clutchnthrottleusa.com/uploads/1/3/0/7/130740522/judaj.pdfIn PDF document text
    • http://files.thegrindconnected.com/uploads/1/3/0/9/130969362/f0018.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_off000064f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64F4 5296 bytes
SHA-256: a2f9f8e1e355b09ad6918e5f1d88ba6d60fc8a5777111a1fddfa5cba21448555
font_01_sfnt_off000076ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76EA 10096 bytes
SHA-256: fc5c698c1ff111568df5f678b500f4bba521ce4ab84fbb13553c36221ef1cefb