Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca66c1f424786281…

MALICIOUS

PDF

78.7 KB Created: 2021-01-06 02:28:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: c7f53eb5e922a3880c6334aec71f89d0 SHA-1: 906c34c373c4c1fa215761c003f175f496a2d2cd SHA-256: ca66c1f42478628142a6040571d2870a68868baeb560209b89b156b103d62485
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded links, with one identified as a known malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to a PDF download, consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gettraff.ru/aws?utm_term=aditya+hrudayam+in+tamil+pdf+format In PDF document text
    • https://static.s123-cdn-static.com/uploads/4373240/normal_5ff115e2631a5.pdfIn PDF document text
    • https://didunebufanef.weebly.com/uploads/1/3/4/6/134680758/minokoj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369783/normal_5fe4eaba910e3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489725/normal_5fe25a32c1899.pdfIn PDF document text
    • https://vemomomofaj.weebly.com/uploads/1/3/2/7/132740815/f850a7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3658984-46ed-4d14-b18b-940dd49b8e20/78525973869.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a03d0a89-f0d8-467e-97a4-0c82c4c622de/lal_singh_chaddha_real_story.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80d9d8ab-2900-4fed-9a4f-292653ffccb1/611817148.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90e2e28f-8ca9-4dcf-8be4-29fffea8f6e3/alliance_rogue_leveling_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb4a293a-c1b0-4255-98d9-60ab62e08420/98901705140.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c04ffdaa-8fb1-4375-b24f-1d89bd8dfbfd/66201431850.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42bdf3d5-c640-4ba2-b49d-07e8620b9e94/4229192574.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2aa7c107-1d9e-4347-acc2-b14ab6c180ed/89154432975.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ba94d0a-9382-4771-8af7-304e59238e8f/east_kensington_philadelphia.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e863.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE863 5192 bytes
SHA-256: 04a12c885eb5aba83db0b86b465994cae30a4ac6a1ede1402730f8c4d9bd97b9
font_01_sfnt_off0000f9e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9E7 2140 bytes
SHA-256: fd0baac36cf8fc893687cbe6b3b8165417b6c4fca046c9a5e64821bfdf5295b8
font_02_sfnt_off0001035b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1035B 12668 bytes
SHA-256: 77111b5c33bbde64ac6b57532f5306647f9dbe8b7edfc903785a8d7a2c78d21f

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