Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c29c85e801cab7b…

MALICIOUS

PDF

80.2 KB Created: 2020-11-24 22:25:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 2417fd9ece0c567d658b262528316abd SHA-1: 4ce0f33cce78b63802a7a3fc4263608d73e79650 SHA-256: 4c29c85e801cab7b7b1e10e8303e5e76bdcbaa636a59fe0b930a3f85ac3a45e7
214 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, with at least one pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were extracted, the PDF structure itself is weaponized to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffine.ru/strik?utm_term=guide+digimon+rearise In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370746/normal_5fb5a4df0df68.pdfIn PDF document text
    • https://mosagalalevo.weebly.com/uploads/1/3/4/6/134668437/mitax_kutovagiwobo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408586/normal_5f92c131a9a37.pdfIn PDF document text
    • https://pivuwexigika.weebly.com/uploads/1/3/4/3/134320842/91daf8.pdfIn PDF document text
    • https://kidunaxu.weebly.com/uploads/1/3/1/4/131437100/502079d42c.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/ladojenefe/19471050965.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/8378620767.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c09d118-88a7-4c03-abf6-ab170f5ef4b4/nufavezufeleno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f58eccb8-512e-4486-a76b-449bc9ec868a/unit_3_resource_book_mcdougal_littel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0be8d542-158a-4cb7-9d08-2d50ef067513/lujifif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e319cbba-7d61-4c3d-ac16-2442c44e7ef7/duxin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/915cd62e-4e55-4399-9a68-ce8d6aa47b40/is_potato_a_vegetable.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_off0000e3f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F8 6308 bytes
SHA-256: df3de6837b5a380d18d6d306f6cdde56d8718a4b3cea461e3bb997030184ce70
font_01_sfnt_off0000f9ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CE 5144 bytes
SHA-256: c69fb713d458a3f7b9273e60cb7cd1ca1da931593596557915fd04b0e4591ea6
font_02_sfnt_off00010b39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B39 11516 bytes
SHA-256: 3325112e6da05de71960cf6a02a62c7e357b93e7957f54fabc89fe619b399435

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