Malicious PDF — malware analysis report

Static analysis result for SHA-256 849f899e5de24c35…

MALICIOUS

PDF

82.7 KB Created: 2021-01-23 00:30:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 6cfa8791d3b28783f31ecf771caec692 SHA-1: 9a036bc61628a5c360dcd2a39194c4a8e7a185c4 SHA-256: 849f899e5de24c3561de13d70c71961c8ab922ebbee1a1dd5b3cd7a18102488d
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The document body, though heavily obfuscated, appears to be a lure related to a 'carburetor linkage diagram'. The presence of an external URI suggests an attempt to redirect the user to a malicious site, likely for phishing or malware distribution.

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
  • 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://druttle.ru/123?utm_term=tecumseh+hm80+carburetor+linkage+diagram PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4453528/normal_5fe7d15d40e84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417405/normal_5fe7d2d0edb56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446395/normal_6009f0a4ddfb9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371248/normal_5feb89e2c8841.pdfIn PDF document text
    • https://site-1192273.mozfiles.com/files/1192273/clash_royale_pc_apk.pdfIn PDF document text
    • https://site-1176636.mozfiles.com/files/1176636/67122382387.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404113/normal_5fd922faab7f0.pdfIn PDF document text
    • https://site-1168389.mozfiles.com/files/1168389/tazodamizojeteteresoso.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416140/normal_5fccaaa651fdb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485166/normal_5fe0cc3af1079.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388428/normal_5fe72282dc4e5.pdfIn PDF document text
    • https://site-1179563.mozfiles.com/files/1179563/poe_fossil_crafting_guide.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/lanorolowu/48494216648.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibebulosaxug/puroxilidoxexisedadipiwiw.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/vekagog.pdfIn PDF document text
    • https://s3.amazonaws.com/zurovajij/57794166658.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_off0000d9de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9DE 6116 bytes
SHA-256: 1e129f08d5220a1f7b9121debee72b13e93175a874fed2240583cb7fc708ef35
font_01_sfnt_off0000ef0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF0D 5840 bytes
SHA-256: f5e5c6d40a89212dd5cfd1bf5575b3130259c585ff53b616af4c3cee58df2e6b
font_02_sfnt_off000102bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102BB 10876 bytes
SHA-256: 9154690fd4e134352bf8b92538d7570d4f6ec17521ae7665cc428e2b46a0191f
font_03_sfnt_off00012839.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12839 16028 bytes
SHA-256: 6e14d9a23925fbdd927c7db5f893cbd4d80a19524b1aae448d44ee15d2611241

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