Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9a594c57b6b1836…

MALICIOUS

PDF

43.2 KB Created: 2020-03-28 10:03:01 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 513f928ebe114f53093a5a43e0c345ac SHA-1: 850d17d53835e2f8b3bf2fecda6d2068e84b10ca SHA-256: b9a594c57b6b1836e813ed9a0e80a8d7190cece93b44f00f99b41dd096637054
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF file contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The document body, though partially corrupted, contains text that appears to be a lure for users to click on these links. The primary intent seems to be directing users to a vast collection of other PDF documents hosted on various domains, potentially for SEO manipulation or to distribute further malicious content. No scripts were extracted from this sample.

Heuristics 3

  • 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
  • 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://saranlpcoach.com/uploads/1/3/0/8/130874223/130874223.html#un+poema+de+4+estrofas+con+rima+asonante
    • http://africasmefinance.com/uploads/1/3/0/6/130604579/1a2c35969a8f23.pdf
    • http://tatismoving.ca/uploads/1/3/0/3/130323268/6766081.pdf
    • http://frenyella.com/uploads/1/3/0/9/130969607/vapadetorivijomeza.pdf
    • http://victoriajho.com/uploads/1/3/0/6/130621261/boreb.pdf
    • http://brutalproxies.com/uploads/1/3/0/8/130814345/lepegodibu.pdf
    • http://uxteststudies.com/uploads/1/3/0/5/130547405/3274869.pdf
    • http://silvercanes.com/uploads/1/3/0/2/130271243/demapiroregew.pdf
    • http://katrinafletcher.com/uploads/1/3/0/3/130313221/xilaziv.pdf
    • http://projectindivisible.com/uploads/1/3/0/5/130551210/nukasozibofi.pdf
    • http://nacjtraining.org/uploads/1/3/0/7/130775014/3763933.pdf
    • http://petcarecompanions.com/uploads/1/3/0/4/130436213/2887b5d4.pdf
    • http://jordanjaffe.com/uploads/1/3/0/2/130274301/829372.pdf
    • http://byogaforlife.com/uploads/1/3/0/7/130776265/wekexoralil-xajuwen.pdf
    • http://devatacircle.org/uploads/1/3/0/7/130739396/rozetaviwezerif.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000069c2.bin
857b2cf18adb3771f3f89685faf3121773ce4fac1388765a4c46920f95480656		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69C2 8520 bytes
font_01_sfnt_off000088ef.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x88EF 16036 bytes

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