Malicious PDF — malware analysis report

Static analysis result for SHA-256 0595f75905f526d3…

MALICIOUS

PDF

131.0 KB Created: 2021-02-26 23:34:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: eecaf241ac762352fef22ac7e8246a64 SHA-1: 2c8b4a56f275693a0d0ff1da6cb3d885a0fa9ce7 SHA-256: 0595f75905f526d378250d04ef7fa654243bb3d7fe32a8ab85fa36b632a0d9be
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded links, with one specifically identified as pointing to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to search queries, suggesting a phishing or redirection attempt. The presence of numerous links on disposable hosting further supports a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://crophysi.ru/aws?utm_term=what+is+the+relative+location+of+the+great+barrier+reef+to+sydney+australia In PDF document text
    • http://desokore.medianewsonline.com/panasonic_viera_smart_tv_touchpad_remote_control.pdfIn PDF document text
    • http://dazolovegom.mygamesonline.org/health_canada_drug_product_database_extract.pdfIn PDF document text
    • https://katalajoguv.weebly.com/uploads/1/3/2/7/132740778/rakur_nexevuv_towidusodoti.pdfIn PDF document text
    • https://kadekorik.weebly.com/uploads/1/3/1/4/131453454/vazosudejelidixom.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368495/normal_600452d737417.pdfIn PDF document text
    • http://winovigamaj.mygamesonline.org/wills_eye_philadelphia_broad_st.pdfIn PDF document text
    • https://wapapoda.weebly.com/uploads/1/3/4/5/134581042/3203461.pdfIn PDF document text
    • http://sipipewawezizuf.getenjoyment.net/chamberlain_garage_door_opener_not_opening_all_the_way.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://jogisav.epizy.com/volkswagen_polo_repair_manual.pdfIn PDF document text
    • http://namepafubi.atwebpages.com/xemigudasoxufaz.pdfIn PDF document text
    • http://ziwemasux.myartsonline.com/does_sat_physics_have_formula_sheet.pdfIn PDF document text
    • http://wififeju.atwebpages.com/heart_of_darkness_short_story.pdfIn PDF document text
    • http://jomovexujufadi.epizy.com/85130533739.pdfIn PDF document text
    • http://kadoxosin.atwebpages.com/zotidabivorib.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001b57f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B57F 5480 bytes
SHA-256: 3f4bb4cc92a5d790ed9c26b6526ccd6e056fb4d1baed5fc1335f22c19dab149a
font_01_sfnt_off0001c826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C826 11768 bytes
SHA-256: c6acbb0b8f6e07b28ee33bbe360b51f91bf22bbeacc52492410c16964d6e1045
font_02_sfnt_off0001ef67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EF67 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361