Malicious PDF — malware analysis report

Static analysis result for SHA-256 01406d2cbfe274b5…

MALICIOUS

PDF

42.1 KB Created: 2020-03-29 08:52:52 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 1b0d00f7d325201d6233cc55ce77f980 SHA-1: 5a66c093f4fa827d9ef53fafb87b4da162e41a3d SHA-256: 01406d2cbfe274b5ddcba5040415f53207d31148c12352b9a8f8c0a924a353a3
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous embedded URLs, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection to malicious sites. The ML classifier strongly indicated maliciousness. The document body, though partially corrupted, contains a URL that aligns with the other extracted IOCs, indicating a likely attempt to direct users to potentially harmful content.

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://74-123-77-252.mgwnet.com/uploads/1/3/0/8/130814597/130814597.html#convertir+50+metros+a+centimetros
    • http://www.atlasnobilis.com/uploads/1/3/0/6/130620789/b1e7d58a8e.pdf
    • http://webdisk.businessliferevival.com/uploads/1/3/0/4/130492038/1827048.pdf
    • http://wordsbyrenee.com/uploads/1/3/0/5/130545475/3123d631739.pdf
    • http://swingstatereal.estate/uploads/1/3/0/6/130603756/vaxovi-borokuwu.pdf
    • http://christine-carson.com/uploads/1/3/0/5/130542936/c3affdba4e.pdf
    • http://mx.victoriacpc.com/uploads/1/3/0/8/130815303/vusofaxaxiji_duter_samidorisak.pdf
    • http://fernandoslandscape.net/uploads/1/3/1/0/131069879/bebapugovutumu.pdf
    • http://themightywonders.net/uploads/1/3/0/5/130544754/wozozapeda.pdf
    • http://homeplusgmbh.com/uploads/1/3/0/6/130639370/bumanezifixexuro.pdf
    • http://syriadirecttraining.org/uploads/1/3/0/2/130289482/bogewunizepo-dalome-nevix.pdf
    • http://my-mediamatters.tech/uploads/1/3/0/2/130274301/6c0dcb65d.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006537.bin
01c10113035b12e6501ba44ef08b71f927b7ce72073abebdc84ff4edf6743823		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6537 8492 bytes
font_01_sfnt_off00008473.bin
42fec308b7cab2f393414e9bdc1a6bd25b4aa0b9070acde390e3b63ffb91afd0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8473 16100 bytes

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