Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc515391020c88c7…

MALICIOUS

PDF

46.5 KB Created: 2020-03-29 11:52:01 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 45e262f5b96d71f33b0fa0fd1c2d6f8e SHA-1: d3a8359d3f73ba09177874abe089bd69ed2b9352 SHA-256: dc515391020c88c79706ab152329295fe16e24452eaf5d7c0a565d58fa85f645
62 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded URLs pointing to various domains, indicative of a link farm or SEO spam campaign. The primary heuristic identified a "PDF_SEO_LINK_FARM" which suggests the document's purpose is to redirect users through a network of generated PDF links. The document body contains a URL that mirrors one of the embedded links, reinforcing the redirection attempt. No scripts were extracted, limiting the analysis to the document structure and embedded links.

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://74-123-79-26.mgwnet.com/uploads/1/3/0/3/130313539/130313539.html#palabras+con+diptongo+separadas+en+silabas+ejemplos
    • http://kyleewald.com/uploads/1/3/1/3/131384489/mavaluxelekosepo.pdf
    • http://stepupliderazgo.com/uploads/1/3/0/5/130588678/0c99631a33.pdf
    • http://zombablaboratory.com/uploads/1/3/0/6/130620644/3034934.pdf
    • http://vantagepointchiro.com/uploads/1/3/0/7/130738924/dipamelej-wuzuwujuru-fadapubaposuzi-xidaluri.pdf
    • http://easenknives.com/uploads/1/3/0/7/130739399/xujujiruj-pibisujalapo.pdf
    • http://sauceis4ever.com/uploads/1/3/0/6/130620625/507b62b20.pdf
    • http://annimuhlegg.com/uploads/1/3/0/4/130488153/wovejil_rubugo.pdf
    • http://creativelevers.com/uploads/1/3/0/2/130272395/peviwivu.pdf
    • http://sobremesaculinary.com/uploads/1/3/0/2/130270826/vebijiverifu.pdf
    • http://qcarguidance.com/uploads/1/3/0/5/130550967/sujuxulerapoxe.pdf
    • http://vacationsurvival101.com/uploads/1/3/0/6/130604874/viposorakevemesupefa.pdf
    • http://loveisawesome.org/uploads/1/3/0/9/130969284/kogatenaf.pdf
    • http://eaglesrockonprestonisland.com/uploads/1/3/1/4/131437409/8353041.pdf
    • http://dcfabrications.com/uploads/1/3/0/5/130588370/rakipobif.pdf
    • http://simplicity-and-perfection.com/uploads/1/3/0/6/130621964/3515473.pdf
    • http://makereducation.com/uploads/1/3/0/7/130739983/9500165.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_off000074f0.bin
efbab0203ab5dfd2817ac46e8285cc42c5bd8d9ebe0c10120a8bd08038549d25		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74F0 9108 bytes
font_01_sfnt_off000095ca.bin
779aa567746046747dac965df7fdfb06ff632674a0a99ce247a327bf89f0fa63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x95CA 16036 bytes

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