Malicious PDF — malware analysis report

Static analysis result for SHA-256 baf8547640034c29…

MALICIOUS

PDF

76.5 KB Created: 2021-03-15 20:36:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 87a9026e16e5fcd03d9f25e82f37ecf1 SHA-1: 7d1d11172ea6b9d972e3661b1b26ba603a6f2efe SHA-256: baf8547640034c291d33682540bcd77aed042ae3ae2afe459ecd31bec717f11c
244 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and a machine learning classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. One critical heuristic identified a link to known malicious redirector infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://yafferge.ru/strik?utm_term=magnetic+door+curtain+rod+walmart In PDF document text
    • https://cdn-cms.f-static.net/uploads/4478146/normal_5fd160705030a.pdfIn PDF document text
    • https://popuverixi.weebly.com/uploads/1/3/1/4/131438274/5653908.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369915/normal_5fe68b9a3b95b.pdfIn PDF document text
    • https://kosefunoz.weebly.com/uploads/1/3/0/7/130775186/3646496.pdfIn PDF document text
    • https://wofudanizosaxig.weebly.com/uploads/1/3/1/6/131637209/370362f8d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380209/normal_5ff579d0ba58e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426279/normal_604da02e3e588.pdfIn PDF document text
    • http://fufoxewiwiv.iblogger.org/sawudanavinezoganulaxulo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367635/normal_6001da91b2648.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/field_visit_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d398e3d-9d15-41a8-ba30-997e8057ed1c/xonegisawododi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f6160b0-4f04-4be3-81bc-7d297b0c22f4/49513762371.pdfIn PDF document text
    • https://s3.amazonaws.com/kujesulad/72412570895.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/baldur_s_gate_2_enhanced_edition_update.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcd5c9c6-8145-4ce0-82fb-41af8a2ff662/96259611654.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22d71123-6423-4003-b4b5-5fb4c8a62a78/how_to_make_yourself_an_avatar_in_photoshop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c2e066e-aa27-4354-9314-b722bf00d104/20226732501.pdfIn PDF document text
    • http://zuvujivir.rf.gd/22166436885.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/101a4fff-952e-4346-94ab-48a484ccfc3c/how_do_i_get_a_letter_of_administration_in_washington_state.pdfIn PDF document text
    • http://kulisiwodomewa.epizy.com/680221138.pdfIn PDF document text
    • https://s3.amazonaws.com/susonanezaj/lajigoronijoba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ea372ba-dc8e-404b-b393-0d8e37257d79/best_advanced_excel_course_online_quora.pdfIn PDF document text
    • http://zafazemebotege.rf.gd/5438006600.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44362eb1-f29f-4a8b-8c2d-3121d500bc7d/grammar_blue_book_quiz.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_off0000edb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB9 5180 bytes
SHA-256: f41d2d9435f456af435ab67bed58e5033b88b1aa582d9207b00a459b6e34920a
font_01_sfnt_off0000ff58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF58 11112 bytes
SHA-256: 9bc826f00a2879ed5f0cc410b3c1e10b8d2239a79bdf5d034d11987a4bc456e3