Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0f556ffc8e8bb7f…

MALICIOUS

PDF

73.5 KB Created: 2020-12-31 04:37:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 73065f38f1dfa9ea456c1826265a8137 SHA-1: 9c285f28ccc3412fe74bcc17ab40d734cb0b741f SHA-256: b0f556ffc8e8bb7fdd16486a704c4f5d6b191acb9c64eb9a2cd04e54268bb6d8
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by multiple heuristics, including a critical finding for a malicious redirector link and a PDF link farm. The embedded links, such as 'https://gettraff.ru/strik?utm_term=subterfuge+synonym+list', suggest an attempt to redirect users to malicious infrastructure. The presence of numerous PDF links indicates a potential SEO manipulation or phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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?utm_term=subterfuge+synonym+list In PDF document text
    • https://cdn-cms.f-static.net/uploads/4371783/normal_5f905b74223d2.pdfIn PDF document text
    • https://fajubixinusejeg.weebly.com/uploads/1/3/4/8/134850070/tupive.pdfIn PDF document text
    • https://xawajedub.weebly.com/uploads/1/3/4/8/134886715/zigaritibuxasavijata.pdfIn PDF document text
    • https://botekajerojaj.weebly.com/uploads/1/3/4/7/134749353/zodexisiw_zaloto_gamaxo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373504/normal_5f8d97de316db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451047/normal_5fd9974b8dd03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414342/normal_5fb2bd0e9374b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417226/normal_5fe8f2624f37a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461509/normal_5fbefe98be997.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406514/normal_5fa5a2e69305b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/43743d39-1b0d-4e8d-9230-9183c579ca63/barosemepiwuxagevim.pdfIn PDF document text
    • https://s3.amazonaws.com/takurugilij/powerpoint_presentation_flow_chart_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bde5a858-050b-4f6b-b290-2f7484e2e40c/formal_complaint_against_ups_driver.pdfIn PDF document text
    • https://s3.amazonaws.com/wifukedot/14168321804.pdfIn PDF document text
    • https://s3.amazonaws.com/liguwubore/rrb_ntpc_bangalore_hall_ticket.pdfIn PDF document text
    • https://s3.amazonaws.com/fasotajedag/meiorin_case_summary.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_off0000e125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE125 5224 bytes
SHA-256: 6d09a6ac62544a9f2c378d9bba0da23093f321aebe3a11f258ca2a72bcd71f82
font_01_sfnt_off0000f2e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E1 11260 bytes
SHA-256: f0f47c6753bd2b168322b951b50bf06aa8f788e073aa731f86a72b87ddd661bd

Open this report in the interactive analyzer, or submit your own file for analysis.