Malicious PDF — malware analysis report

Static analysis result for SHA-256 4912063edf8949e5…

MALICIOUS

PDF

111.7 KB Created: 2020-12-08 15:17:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 665720b58d9280ac6bdebf297f082795 SHA-1: 129cc08e90b2c2a5a18e41736d201ee83ea6065b SHA-256: 4912063edf8949e503fc85475b2536d2f9fec978170201e4f59626a1837e33b8
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ggtraff.ru'. This indicates an attempt to lure the user to a potentially harmful website. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL is sufficient evidence of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://ggtraff.ru/strik?utm_term=introduction+to+law+pdf+uk In PDF document text
    • https://static.s123-cdn-static.com/uploads/4466676/normal_5fcbbee7d3621.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495269/normal_5fb7d786eb06a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416144/normal_5fc3587d6972a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f13c021f-076d-4b46-91f4-75be94a37b80/momozizuxuzilur.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/24962932439.pdfIn PDF document text
    • https://s3.amazonaws.com/wizedumi/14776629781.pdfIn PDF document text
    • https://s3.amazonaws.com/sivanira/honda_generator_repair_manual_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vasagesorajirem/47666045676.pdfIn PDF document text
    • https://s3.amazonaws.com/jebupofedijakuk/ridowobusawunekorapo.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/kogedoxesokojelimogore.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55d49f94-3614-455c-9a68-cbd12c21c423/89899319327.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/xiwegapujuvilubijefamebo.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_off0001794b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1794B 5064 bytes
SHA-256: 68bf76a55c9a56e0228787ca6debf9c716a61011173754b49529cb7e99d5c448
font_01_sfnt_off00018aa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18AA9 11900 bytes
SHA-256: 94ab6a7ded00e86b788768066ce496be6ebed99d2451f58cb363a02fcdc3e1d3