Malicious PDF — malware analysis report

Static analysis result for SHA-256 c38fc3aabf7c3cc1…

MALICIOUS

PDF

68.2 KB Created: 2020-10-07 02:30:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 8726932f1380f53f8ae399ed90995565 SHA-1: bbbd7040041970aaafee5762a2f9cd441d25c8e8 SHA-256: c38fc3aabf7c3cc13912c5e831abbd0e748b89a4327f26dd04e6103f92f60d7d
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://ttraff.cc/pify?keyword=5e+order+domain+source In PDF document text
    • http://files.becomingyoupsychology.com/uploads/1/3/0/8/130813054/tedegiw_sifabatukij_bamefewup.pdfIn PDF document text
    • http://gepaduv.elizamaleckidance.com/uploads/1/3/1/8/131856543/031ffc5.pdfIn PDF document text
    • http://files.pleasantpointcommunitychurch.com/uploads/1/3/1/0/131070459/85451.pdfIn PDF document text
    • http://files.lyndseystlc.org/uploads/1/3/0/8/130874086/5383696.pdfIn PDF document text
    • http://jivane.firstalternativetherapies.com/uploads/1/3/2/7/132740978/lufelevukifubopanufa.pdfIn PDF document text
    • https://site-1042196.mozfiles.com/files/1042196/42210080927.pdfIn PDF document text
    • https://site-1042541.mozfiles.com/files/1042541/refuguvem.pdfIn PDF document text
    • https://site-1038796.mozfiles.com/files/1038796/detajuxalowetenekaxul.pdfIn PDF document text
    • https://site-1037228.mozfiles.com/files/1037228/wenulovo.pdfIn PDF document text
    • https://site-1040885.mozfiles.com/files/1040885/nugewak.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/1/0483/5685/1861/files/competitive_strength_assessment_lululemon.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/4784/0661/files/escalation_protocol_schedule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2141/7123/files/17285860201.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1850/0765/files/xisule.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5241/7703/files/discrete_and_continuous_functions_worksheet.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_off0000ceac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEAC 5084 bytes
SHA-256: 7e29fc9a8f325de3cd1e048cd9bd8eff7a5b3d1dac1a686e19972be25b7356e8
font_01_sfnt_off0000dfde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFDE 10420 bytes
SHA-256: d4b3440e2e5c805be94a25874fcf4c2dbfe86f239ea6189deac9d7ad16d15329

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