Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e8dd54a955b6899…

MALICIOUS

PDF

73.6 KB Created: 2021-03-01 02:57:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 007ecd64c0884a1b324ae92c36f3858b SHA-1: d3834715291c8519586c45678d21b253157eb4c1 SHA-256: 0e8dd54a955b6899ecc51dadec6e82b7d46e6dc1e17a2ba53b8955af5c9c2c51
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to phishing or malware hosting sites. The embedded URLs and the PDF structure point towards a malicious document designed to lure users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://vilenefex.ru/aws?utm_term=the+boy+in+the+black+suit+chapter+1+summary PDF link annotation
    • https://zibinileder.weebly.com/uploads/1/3/4/7/134748255/3096927.pdfIn PDF document text
    • https://zotizoju.weebly.com/uploads/1/3/5/3/135349435/lujev-rofugozenilem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464707/normal_603b6a616ccbe.pdfIn PDF document text
    • https://cdn.sqhk.co/totafeta/eggLjia/54348790334.pdfIn PDF document text
    • https://cdn.sqhk.co/pipidopowewe/Khiajcw/65458157769.pdfIn PDF document text
    • https://mepubigavij.weebly.com/uploads/1/3/4/5/134599646/4096010.pdfIn PDF document text
    • https://cdn.sqhk.co/rikopekela/8yhhcq9/fidget_spinner_coloring_book_drawing_games.pdfIn PDF document text
    • https://cdn.sqhk.co/duvetezoje/ygjccrK/throne_of_glass_box_set_used.pdfIn PDF document text
    • https://cdn.sqhk.co/godereliku/jigejgw/basket_paradox_2019_free_arcade_basketball_games.pdfIn PDF document text
    • https://cdn.sqhk.co/mixenezir/i0CjdfA/66633437032.pdfIn PDF document text
    • https://cdn.sqhk.co/dugixikisim/jiIAEQm/wakusesetolukewidof.pdfIn PDF document text
    • https://xusolufazajone.weebly.com/uploads/1/3/1/3/131383045/8748354.pdfIn PDF document text
    • https://birifebirox.weebly.com/uploads/1/3/3/9/133999865/modise-runabuwef-rozilufe-dosewokoluvola.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386333/normal_6007667a6cfa7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468823/normal_5febd7ce47068.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376625/normal_5fd9f96eeeddb.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/voxulija/area_of_trapezoid_worksheet_with_answers.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_off0000e3e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3E5 5480 bytes
SHA-256: b61e8a238e67bd6c7ff8dc1c2c855835e6067465bea801396f456be755728178
font_01_sfnt_off0000f66a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF66A 10040 bytes
SHA-256: 2793b795fd5dec0dbb7902a9dfbbfe1feeec4e414590fb79cc21e4f99cf98f1d

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