Malicious PDF — malware analysis report

Static analysis result for SHA-256 101f7ca7dcc0c6e7…

MALICIOUS

PDF

68.2 KB Created: 2020-11-24 14:50:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 580a42605c3e0c7dafcd58282938d5d9 SHA-1: 9fd31c12c703b7eca2720a1c29c67ac0ae4d6929 SHA-256: 101f7ca7dcc0c6e7c091f0f5fa9eec5751086879d18917859f12fb212b8e2a14
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, and it contains links to known malicious redirector infrastructure. The document appears to be part of a link farm designed to drive traffic to potentially malicious sites, masquerading as information related to financial services. No scripts were extracted, but the presence of embedded URLs and the heuristic firings strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://cctraff.ru/strik?utm_term=wells+fargo+atm+grand+forks+nd In PDF document text
    • https://ponatuxo.weebly.com/uploads/1/3/4/5/134596183/5793c6a451.pdfIn PDF document text
    • https://kunobile.weebly.com/uploads/1/3/4/5/134517695/tamizilem.pdfIn PDF document text
    • https://wuvirinofibugiz.weebly.com/uploads/1/3/1/0/131070402/fijuxiwu.pdfIn PDF document text
    • https://setinedib.weebly.com/uploads/1/3/4/6/134684411/gimodinago.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/6a0c5ffc-b0ae-4fc4-978c-f9bbb7e6ce3f/55678185871.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35a3d5a3-d2e4-4fa4-985f-af7a17616185/sufuromiretakumaka.pdfIn PDF document text
    • https://s3.amazonaws.com/mamukawaxatali/palumipiwesavixolibutov.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/95975023145.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4f6b621b-76b9-4f38-9c29-507739a70313/9995830792.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52478375-17e3-44d4-9fb3-c241b6ad34ac/5553702604.pdfIn PDF document text
    • https://s3.amazonaws.com/lopazura/fawumovenages.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_off0000c23d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC23D 5044 bytes
SHA-256: c3a5586620e439826d69f97606d879c6e6aa91426145b6dbe4f75e32e16d39c5
font_01_sfnt_off0000d354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD354 10188 bytes
SHA-256: 10807db02bebc27322a19aa7984947fa8eaa89beb8f5cefafd5f82d1c646cad7
font_02_sfnt_off0000f5fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5FE 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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