Malicious PDF — malware analysis report

Static analysis result for SHA-256 d000d24071517416…

MALICIOUS

PDF

73.3 KB Created: 2020-12-08 09:27:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 4a0b5cce742685a9acfcb51e16111557 SHA-1: 9b23b3e6ada138c43bd27360b0e5f9afba51ba6b SHA-256: d000d240715174169923770036027011af05fd1269669661dddedd17b369fc36
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically pointing to known malicious redirector infrastructure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the presence of numerous external links suggests a link farm or redirection strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://traffmen.ru/123?utm_term=elite+soccer+magazine+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4463264/normal_5fa4541ed0974.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459163/normal_5fca69095ef57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446642/normal_5fbd472fb4fcf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389570/normal_5f9be162d5344.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500911/normal_5fad65b58203e.pdfIn PDF document text
    • https://kopupoko.weebly.com/uploads/1/3/4/4/134471128/d50609f53f2.pdfIn PDF document text
    • http://assets.ngin.com/attachments/document/002In 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://static1.squarespace.com/static/5fc6743f88c99b6d37cd7f20/t/5fcd3fc4662d5e24e0af1b29/1607286726339/77057007844.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc59156403f5353fdb5474b/t/5fca807edee23a47f8e145f2/1607106686357/mebugapunesinetamijufum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f0f30ae-bc52-4732-ab22-5c862a9b9987/tipaz.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc11b4016f6d44b07c000b4/t/5fc2be2d5147b148048cfe2a/1606598191759/is_crunchyroll_down_twitter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/781aceca-deac-48fe-8d8e-09c015e1b7e0/magikaxujagozobodozibo.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b890.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB890 5268 bytes
SHA-256: 8de4fc784ba7e49202ec5854fbfad8ecb881deafd315990cc21ac45ee199c4ac
font_01_sfnt_off0000ca69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA69 10708 bytes
SHA-256: 1f63b6c18bc784e86ae3224eea105d9e87d437d382409ad258b38ac693d50d94
font_02_sfnt_off0000ef12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF12 17812 bytes
SHA-256: 037502b26228a4b606bfbaac35278458dbf9111df1c638019d7dacafbe5a8ef5
font_03_sfnt_off00010a24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A24 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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