Malicious PDF — malware analysis report

Static analysis result for SHA-256 5faf61d4b2d39c9c…

MALICIOUS

PDF

82.0 KB Created: 2021-05-23 12:12:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 12499416fdd1385d219f9c1b8d0cacb9 SHA-1: 32a81d828990275d864177e14adbc05cbf11f06c SHA-256: 5faf61d4b2d39c9c81268872c58ce9364e36c7c2af4683c7ded903b123410d87
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL, 'https://dafemum.ru/strik?utm_term=mod+monedas+infinitas+dream+league+soccer+2020', is the primary indicator of malicious intent. The document body, though heavily obfuscated, suggests a lure related to game modifications, likely to trick users into visiting the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 4

  • 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.
  • 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://dafemum.ru/strik?utm_term=mod+monedas+infinitas+dream+league+soccer+2020 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366969/normal_601ba5b543a43.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369138/normal_5fce34e3d515f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456165/normal_5fe70a622f783.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402932/normal_60591d3e1d0b4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414173/normal_5ff78a1818c72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484609/normal_6067110c3df23.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451542/normal_5fe788dc7fc96.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501656/normal_5ffcf20f91dd2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401716/normal_605b64bcad28d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387581/normal_600feb645c337.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386076/normal_5fef6d49cabe4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473645/normal_604f371388549.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384640/normal_5fe6385e70e09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366397/normal_5fd26c94e41a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368479/normal_6013490439e60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427828/normal_600beece8ae0e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466391/normal_5fd79b9149633.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/redegelesibif/trust_graphics_tablet_software.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8477c99-1a15-4708-b47f-28f18982db41/7194309698.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/78267583938.pdfIn PDF document text
    • https://s3.amazonaws.com/vovopafubipu/address_icon_svg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/245231ce-ccd6-41ba-9bd1-77f2bdfe296e/is_800_steel_code_1984_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ad8fe6c-e44a-4308-b390-e85921cc6ed1/sidofejuxidikape.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/802f04d6-8208-4252-a0b9-7700eab80f7c/49104210294.pdfIn PDF document text
    • https://s3.amazonaws.com/tipikaxe/45325561951.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6236cc95-d321-4023-a423-c6c4c3a71eaa/metowojokubovu.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_off0000f7a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A9 5620 bytes
SHA-256: 4e871fcf4d46f6e8c7859f81cc0e918e8e23de674640cfe6dfffb129a7b0664b
font_01_sfnt_off00010abb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ABB 19888 bytes
SHA-256: fb1bb1dc859913e9a538b3f4f89c5488a2b75d769e8d118c1e8c7d4186465349