Malicious PDF — malware analysis report

Static analysis result for SHA-256 3084f6d0ff9084a7…

MALICIOUS

PDF

95.4 KB Created: 2021-06-03 08:54:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: e69b6683075bd5646c3c973e01121f2b SHA-1: a6615407c834afa9d8e68a8587cbccb15e0dda09 SHA-256: 3084f6d0ff9084a7cd2f4a3f1fce5a85929db330257fb06e5113ac50f7013a72
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to other PDFs, suggesting a link farm or SEO abuse tactic. The primary URL, 'https://ketchas.ru/pbw?utm_term=hindu+holy+book+bhagavad+gita+in+hindi+pdf', is presented as a holy book to entice clicks. ClamAV and ML classifiers strongly indicate malicious intent, likely phishing or malware delivery via the linked content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://ketchas.ru/pbw?utm_term=hindu+holy+book+bhagavad+gita+in+hindi+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4474979/normal_5ff4749a8f32f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423442/normal_605cee0ccbf73.pdfIn PDF document text
    • https://bopuwivotapupo.weebly.com/uploads/1/3/4/7/134745193/94223c.pdfIn PDF document text
    • https://javudufopatoka.weebly.com/uploads/1/3/1/6/131606124/ba84b4b8.pdfIn PDF document text
    • https://kixuvatapowow.weebly.com/uploads/1/3/1/3/131383305/sodik_pilejovukesuxiz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487906/normal_5ffb86edd3669.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4385634/normal_60b5e90734ee8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393358/normal_5fc5aa277021e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491969/normal_604f29b818780.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458622/normal_6039a4be7db3f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413465/normal_5fc846c13a032.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4481289/normal_60b719f6f036f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503050/normal_5fe5d722d80ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407313/normal_5fe7a0255b88d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408991/normal_5fdd5d0f1a0ef.pdfIn PDF document text
    • https://gedobelega.weebly.com/uploads/1/3/4/3/134375191/pesera_biwasawijenovaj.pdfIn PDF document text
    • https://gefosutobova.weebly.com/uploads/1/3/4/6/134647182/5549970.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496815/normal_603ecf7413b8d.pdfIn PDF document text
    • https://desijikero.weebly.com/uploads/1/3/5/9/135964668/7149052.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413835/normal_5ff23b1126b42.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497370/normal_5ffb8188722ff.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00013fd8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x13FD8 15056 bytes
SHA-256: 95596fdb87f287ffe7455824531d3f8593a2fc9b2012f975a8a92d7070ab6bd8
font_00_sfnt_off0000e99a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE99A 5356 bytes
SHA-256: 2f5ad0dc3579524dd580b8ad50f52a2b686054bf1b7d43795e58368bd523a005
font_01_sfnt_off0000fbdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBDF 3720 bytes
SHA-256: b91f3c26f37c28538ed09035cbea6f9221827f1e30b50c452f08cc820bcc167b
font_02_sfnt_off00010742.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10742 10280 bytes
SHA-256: 7bf76d4b1fa0a455069a03973a988f349cf9c0ff6239413d52049ba209940aac
font_03_sfnt_off00012a7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A7F 16172 bytes
SHA-256: 6e699eab9a6fef16b3ea923df7b93ce1c5cbd97c7a594d359cd98c90be4a35f1