Malicious PDF — malware analysis report

Static analysis result for SHA-256 17519802015f8bf7…

MALICIOUS

PDF

47.2 KB Created: 2020-04-21 07:14:33 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6) First seen: 2020-09-24
MD5: 2b5c50578521a1aaf01723d6c0470b40 SHA-1: 6b5e2f4a41ed451c81b5931b9d86ccdcb01abf1b SHA-256: 17519802015f8bf79a0b777fd43ffbf72a7f37270fc09330222354d548fac775
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links to various domains, identified by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged this PDF as malicious with high confidence. The embedded URLs suggest a link farm or SEO manipulation tactic, potentially distributing further malicious content or leading to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 http://penetis.org/uploads/1/3/0/7/130776103/130776103.html#cdac+exam+form+date+2019 PDF link annotation
    • http://chickenindex.com/uploads/1/3/0/7/130775228/zexalododemem.pdfIn PDF document text
    • http://rallynational.info/uploads/1/3/1/4/131454349/73f77148.pdfIn PDF document text
    • http://nicholassjohnson.net/uploads/1/3/0/7/130775510/kiwusuzaxa.pdfIn PDF document text
    • http://baseportfolio.com/uploads/1/3/0/2/130291724/6d6587ea63301fc.pdfIn PDF document text
    • http://canadastoners.com/uploads/1/3/0/6/130620524/63478.pdfIn PDF document text
    • http://swamividyananda.org/uploads/1/3/1/0/131070523/najegonibeve.pdfIn PDF document text
    • http://9lazy3leather.com/uploads/1/3/0/8/130814863/powige.pdfIn PDF document text
    • http://crossfitzonedesign.net/uploads/1/3/0/6/130604979/584433022e4876.pdfIn PDF document text
    • http://effective-analytical-chemistry-llc.com/uploads/1/3/0/6/130620644/4832652.pdfIn PDF document text
    • http://depilsugar.com/uploads/1/3/1/6/131606727/262575.pdfIn PDF document text
    • http://burchflavorandaroma.com/uploads/1/3/0/5/130590714/tawoli.pdfIn PDF document text
    • http://shopmantrajewelry.com/uploads/1/3/0/2/130289760/8728e.pdfIn PDF document text
    • http://intuisense.fr/uploads/1/3/1/4/131412290/xovilujuz-rudidoda-jaribume.pdfIn PDF document text
    • http://igc-consulting.com/uploads/1/3/0/6/130605325/melolukarazibu_binurudakuwutut.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn 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_off000071a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71A1 7956 bytes
SHA-256: 30cd2073ba54caf9e84031f9bd94e8069420838834b27fb722e70b9e0fead596
font_01_sfnt_off0000905e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x905E 2228 bytes
SHA-256: 236d54f3e2479d5e72da3d1be4616617e509581c3e9108e812f40a19f40d28ff
font_02_sfnt_off00009a7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A7C 16224 bytes
SHA-256: da097a8c459adbfdf1b1d97412e41569b305acf822c6e113ff3e46e38a168572

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