Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d5a6a7e4880192e…

MALICIOUS

PDF

39.1 KB Created: 2020-09-16 12:01:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 044c8d9def3c5ff066c84438427d72f7 SHA-1: eb5808fdb8a051d721d72c1ecb1b6aa963420208 SHA-256: 0d5a6a7e4880192e25c04533d3de1b17fe6a49336c5488f60c3ef7c00e687d36
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, including one pointing to a known malicious redirector. The document body, though obfuscated, contains text related to a 'Nighthawk carbon monoxide detector error 888' and includes URLs that appear to be part of a link farm. This suggests the document is designed to trick users into visiting malicious websites, likely for phishing or malware distribution.

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 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.
  • 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.com/wb?keyword=nighthawk%20carbon%20monoxide%20detector%20error%20888
    • http://feputileb.ate9dancecompany.com/uploads/1/3/1/4/131453133/a3adb.pdf
    • http://files.jordanmclayton.com/uploads/1/3/1/6/131607163/4443392.pdf
    • http://files.jodierandolphdance.org/uploads/1/3/0/9/130969485/f5303481.pdf
    • http://lomimozuw.tumbleweedsandnotions.com/uploads/1/3/2/8/132814930/wukepezuva-maginu.pdf
    • http://files.border-lands.com/uploads/1/3/1/0/131070483/dugufakozubutipa.pdf
    • http://veneda.alisikamainecoons.co.uk/uploads/1/3/2/6/132683001/9182432.pdf
    • http://files.suncoastarchitect.com/uploads/1/3/1/4/131407802/dowuzawuweb-vowugodaxag-muwovugozanoke-damupuredaba.pdf
    • http://gexided.rawbeautynyc.com/uploads/1/3/1/6/131606174/buwomovawuvo.pdf
    • http://files.itshoursunlimited.com/uploads/1/3/2/6/132695352/wesomolofibed-lirifa-sukowuxamodo-regetefiseza.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/4832/1692/files/eid_mubarak_images_with_flowers.pdf
    • https://cdn.shopify.com/s/files/1/0432/0896/6301/files/california_mushrooms_the_comprehensive_identification_guide.pdf
    • https://cdn.shopify.com/s/files/1/0438/4207/6837/files/gigew.pdf
    • https://cdn.shopify.com/s/files/1/0437/2784/7576/files/us_air_force_uniforms_vietnam.pdf
    • https://cdn.shopify.com/s/files/1/0434/3349/2641/files/gobor.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b09.bin
7da6b8d883db3a2b2ac154cb31760e96dd3c986952568c56a0e9506f9975968f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B09 5672 bytes
font_01_sfnt_off00006e4b.bin
9b29cf255be355b52ae8be4deeeb6a82dff37a219e3e521ef325465d11956586
pdf-font-stream PDF embedded font (sfnt) at offset 0x6E4B 9752 bytes