Malicious PDF — malware analysis report

Static analysis result for SHA-256 fcb5be81c1619577…

MALICIOUS

PDF

72.3 KB Created: 2020-12-19 12:02:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 90e5e97857b24be99695de4d3d6455fe SHA-1: b43a2f0dbce33f0ebfdc98a6cccaabf1dea58774 SHA-256: fcb5be81c1619577ed74d31422e0e1832a2019e1c6bf06bdc90e0c58a3e6829d
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a significant number of embedded links, with one specifically pointing to known malicious redirector infrastructure. This suggests the document is designed to lead users to harmful websites, likely for phishing or to download further malware. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffmen.ru/123?utm_term=marketing+for+hospitality+and+tourism+pdf+kotler In PDF document text
    • https://xudidetopos.weebly.com/uploads/1/3/4/5/134579215/41ac803.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421770/normal_5fa41405ac6dd.pdfIn PDF document text
    • https://zisogojevup.weebly.com/uploads/1/3/1/4/131453725/jomexurezugud.pdfIn PDF document text
    • https://norofuzalugegok.weebly.com/uploads/1/3/4/8/134882219/959327f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481163/normal_5fb7d2584428a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447270/normal_5fd67f4ce98f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410199/normal_5faa6eff10e5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376850/normal_5f8a620b77dc9.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
    • https://uploads.strikinglycdn.com/files/bc39a3e6-270d-4fdc-b171-4c3c9f32ce83/auto_shop_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/vertex42_spreadsheets_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4eaba1452f90b7ffed152/t/5fc5bc8a173fb5383b6a1c43/1606794379553/sister_callista_roy_theory_is_known_as.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/315c5025-774b-436a-ba0b-b93668c73d15/ferozu.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cef8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEF8 5508 bytes
SHA-256: 25e0d5c0dfde11cf11f3fccc93077d1768bc5f63677d9fd593403f0d000c3360
font_01_sfnt_off0000e199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE199 10904 bytes
SHA-256: e59d0a952a29287f43fd22cd695de6626c40eab75c64bfda5ced9aef70a70f94
font_02_sfnt_off0001062e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1062E 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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